A good 4x100 m changeover keeps the baton moving quickly through a secure pass. The Australian approach centres on the Push Pass: the outgoing runner accelerates, presents a steady hand on the incoming runner's call, and receives the baton while both keep running.
This guide takes you from understanding the takeover zone to teaching the Push Pass, setting each pair's starting mark and refining the exchange at race speed. Use the calculator to suggest initial marks, then build a changeover your team can repeat with confidence.
Start with the technique; refine it with your team. The calculator estimates starting marks from a sprint model. Runners react, accelerate and slow differently, so test every mark at full speed in training and adjust from what you see.
Understand the exchange
The runners and the zone
The incoming runner carries the baton towards the exchange. The outgoing runner is the receiver who accelerates to take it.
The 30 m stretch where the baton has to change hands. The outgoing runner starts inside it.
In this calculator, the distance the outgoing runner runs before receiving the baton. Add their starting position to find the pass position within the zone.
What is a 'go' mark?
A go mark is a check mark placed on the track behind the waiting outgoing runner. When the incoming runner reaches it, the outgoing runner starts sprinting. It times the start so the pair can make the pass while both are running at speed.
Measure the mark back from where the outgoing runner stands. Too close, and the incoming runner may catch up before the receiver has built enough speed. Too far back, and the receiver may get away before the baton can reach them. The calculator below uses your four runners' 100 m times to suggest a starting mark for each pair.
Watch the live demonstrations to see how the outgoing runner accelerates and the pair completes the pass while running. Follow the sequence: accelerate, call, present the hand, transfer the baton and run on.
Essential rules
Since the 2018 rule change, the old 10 m acceleration zone and 20 m changeover zone are one 30 m takeover zone. The outgoing runner starts inside it, and the pass has to finish inside it.
In the 4×100 m and 4×200 m, the takeover zone is 30 m long. The outgoing runner must start from inside the zone.
Only the baton's position counts, not the runners' feet or bodies, and the whole baton is considered. The pass starts when the receiver touches it and ends when only the receiver holds it.
On legs run in lanes, the outgoing runner can place a check mark in their own lane. What counts as a legal mark varies (some school carnivals allow only Blu Tack), so check the meet's rules first.
The athlete who dropped it must pick it up, without getting in the way of anyone else. Runners stay in their lane after the pass until the track is clear.
Figure / Track map
How far each leg carries the baton
Swipe sideways to see the whole track.
Distances with the baton only. The ranges depend on where each handover happens within the 30 m zones; acceleration before receiving is excluded. These are approximate possible limits derived from World Athletics Technical Rule 24.3, not elite averages or targets.
Example: handovers 25 m into all three zones give approximately 105 m → 100 m → 100 m → 95 m with the baton. Lane 1 schematic; stagger and arm reach are omitted.
Teach the Push Pass
Australian Athletics encourages only the Push Pass technique for Australian athletes. Upsweep and Downsweep are not recommended for any Australian athletes. They are described below for recognition and comparison only.
The only technique encouraged by Australian Athletics. Use this technique when coaching Australian athletes.
The outgoing runner presents a steady hand behind them at shoulder height, or as close as the athlete's shoulder mobility allows, with the receiving arm extended roughly parallel to the track. The incoming runner pushes the baton forward into that hand.
Interactive 3d relay Push Pass
Explore the receiving arm, hand position and baton transfer, then use the coaching steps below. Bring the receiving hand as close to shoulder height as the athlete's shoulder mobility comfortably allows.
Open the interactive 3D relay Push Pass in a new tab
Use this demonstration to study the receiving hand shape, the steady target and the forward placement of the baton. Then use the coaching steps below to rehearse the technique with your athletes.
Coach the exchange
The receiver provides a steady target; the passer puts the baton into it. Agree on the receiving hand and one short call, such as "Hand", before starting.
- Receiver: accelerate first. Start sprinting when the incoming runner reaches the go mark. Look ahead and use both arms until you hear the agreed call. Keep looking forwards after leaving.
- Passer: call when within reach. Keep running hard. Give the agreed call when you can deliver the baton as the receiver's hand comes back. Practise this timing together: calling too early leaves the receiver running with one arm held back.
- Receiver: show the hand. On the call, extend the receiving arm behind at shoulder height, or as close as the athlete's shoulder mobility allows without twisting the torso. Face the palm back towards the passer, with the thumb pointing down and separated from the fingers. Keep the hand open and steady.
- Passer: place the baton. Look at the open hand and push the free end of the baton firmly into the palm. Leave enough exposed baton for the receiver to grasp. Avoid sweeping it up or chopping it down. The receiver holds the target steady rather than reaching around to find the baton.
- Secure and run on. The receiver closes their grip as the baton arrives; the passer releases once it is secure. Resume normal arm action and keep sprinting.
Use this drill to help the passer judge the distance between the athletes at the pass and time their call. The receiver practises recognising their partner's call and presenting a steady hand in response.
Watch the passing-distance and call drill on Vimeo
Coaching focus: agree on the call before starting. Check whether the receiver has time to show the hand and the passer can then place the baton promptly. Build familiarity through controlled practice, then check the timing again at race speed; the drill does not establish one fixed calling distance for every pair.
Technique reference: Athletics Ireland relay coaching guide. It supports a high, steady receiving arm, thumb down, a call from the incoming runner and a forward push into the hand. The mobility adjustment and practice checks here are coaching adaptations.
What to watch for
Keep the receiver facing forwards, with the torso aligned in the running direction. Reach back through the shoulder without turning to search for the baton. A hand below the athlete's comfortable receiving height, a bent receiving elbow or a moving target makes placement harder. Work towards shoulder height within the athlete's available shoulder mobility; do not force the arm higher by twisting the torso or arching the back. Practise a comfortable, repeatable target at walking pace before adding speed.
Rehearse both hand combinations: right to left for exchanges 1 to 2 and 3 to 4; left to right for 2 to 3. Progress from stationary placement to walking, controlled running and full-speed exchanges. Check a steady target and secure grip before increasing speed.
Other passes: recognition only
Upsweep and Downsweep are not recommended for Australian athletes. These descriptions are for recognition and comparison only.
Upsweep
The receiver holds the hand low and the passer brings the baton upwards into it.
Downsweep
The receiver reaches back with the palm facing up and the passer brings the baton down into the hand.
The pass descriptions reflect coaching practice; they do not establish superiority in comparative trials. Set the calculator's arm gap to match your team's measured Push Pass reach.
Calculate your starting marks
Enter the 100 m time for each leg in running order. The calculator works out how fast the incoming runner arrives, how quickly the outgoing runner gets up to speed, and where the go mark needs to sit for the baton to change hands at the point you choose.
Before you enter your team
- Enter the four 100 m times in running order. Use recent times run in spikes, not best-ever times from years ago.
- Pick where you want the exchange to happen. Leave a few metres before the end of the 30 m zone to complete the pass. Read why timing matters.
- Measure the go mark back from where the outgoing runner stands and place the check mark there, in metres or heel-to-toe steps.
- Test it at full speed. Follow the testing and adjustment steps below.
What you need: recent 100 m times for all four runners, a tape measure and the outgoing runner's shoe length. Results update as you enter the values.
1Your team
Example times are loaded; replace them with your team's.
2The exchange
Most teams start at the very back of the zone (0 m) to get the longest run-up.
3Measuring
For converting the mark into heel-to-toe steps. Measure the spike, not the foot.
Fine-tune the model
The distance the arms cover. 1.6 m is what the Hong Kong team measured. Adjust this to the reach measured during your team's Push Pass exchanges.
Runners have slowed slightly by the end of their leg. Drop this if your incoming runner fades badly.
How quickly the outgoing runner reaches top speed. Lower is quicker. 1.1 s is a typical value.
Results update as you edit. View your go marks and exchange diagram.
Your go marks
Distance back from where the outgoing runner stands to the check mark. When the incoming runner hits the mark, the outgoing runner goes.
See the exchange
Looking down on the lane, drawn to scale. Runners go left to right. Press play to watch the incoming runner hit the go mark and the pair meet at the pass. Dots show positions at equal time intervals: widening gaps show acceleration. Arrows show current speed on the same scale for both runners. The outgoing runner continues accelerating after receiving the baton.
Swipe sideways to see the whole lane.
Incoming
Outgoing
Show the timing chart
Both runners' positions over time from the moment the incoming runner hits the go mark. The lines meet, less the arm gap, at the pass.
Test and adjust your marks
Use the calculated marks as a starting point. Keep the same starting position and test each pair at race speed.
- Prepare the pair. Warm up fully. Rehearse the call, steady hand and secure grip at walking pace, then controlled running before full-speed attempts.
- Measure and run. Measure the mark back from the outgoing runner's starting position. The incoming runner runs hard through it; the outgoing runner commits to accelerating.
- Observe the whole transfer. Record where the baton transfer finishes, whether either runner slows or turns, and whether the receiver gives a steady hand. Allow enough recovery to repeat at race speed.
- Adjust one thing at a time. First check that the receiver leaves on the mark and both runners commit. If the passer catches up too early and must ease off, move the mark farther back. If the receiver pulls away before the passer can reach them, bring it closer. Change half a heel-to-toe step at a time and retest.
- Choose a repeatable exchange. Compare several attempts, leaving room beyond the team's later transfers. If timing the exchange, use the same distance spanning the zone each time. Move the target later only when speed and consistency support it.
A note on leg order
Leg order matters too. In a mathematical model of elite men's relays, the fastest overall times came with the fastest runner on the first leg and the two slowest on the last two legs (Ward-Smith and Radford 2002). Lane draw also affected times, which no coach can control. Treat this as one model's answer. Most coaches also weigh bend running, baton skills and who handles pressure on the anchor leg.
Why the timing matters
Why aim for a later changeover?
The aim is to move the baton through the zone quickly. The incoming runner arrives at speed; the outgoing runner starts from rest and needs distance to accelerate. Delaying the handover gives the outgoing runner more time to build speed without carrying the baton, while the incoming runner continues carrying it quickly. The benefit comes from the speeds of the two runners, not simply from passing at a later painted mark.
Why not just pass at 10 m?
If the outgoing runner starts at 0 m and receives at 10 m, they have had only 10 m to accelerate. They will usually still be substantially slower than the incoming runner. Passing then transfers the baton to the slower athlete sooner, so it travels through the next part of the zone at that athlete's lower speed. The incoming runner may also have to ease off to avoid catching the receiver too early. A clean early pass can therefore still be a slow exchange.
Passing farther along the zone can reduce that speed drop: the outgoing runner has built more speed before taking over. Research on an international men's relay team found an association between later exchanges and better exchange performance (Salo, 2001). That study used the former zone arrangement; its exchange distances should not be copied directly into today's 30 m zone. Nor does the finding mean that every team should aim at the final metre.
Why can an exchange be too late?
The closer the planned pass is to the end, the less room remains for normal variation. An outgoing runner who leaves slightly early or accelerates better than expected can be farther ahead. An incoming runner who arrives slower than expected may take longer to reach them. A delayed hand signal or an inaccurate first contact can use the remaining space before the Push Pass is complete.
For scale, a baton moving at 10 m/s covers 1 m in 0.10 seconds. This is an illustration, not a reaction-time allowance: a small distance buffer disappears quickly. The exchange must be completed within the zone, so planning the first touch just before the end leaves too little room to finish. A stochastic relay model explicitly examines this trade-off between expected race time and the risk of overrunning the zone (Karlsson and Lunander, 2024).
Later is useful only while the pair can still make the pass
If the outgoing runner becomes faster than the incoming runner before they are within passing reach, the gap starts opening again. Moving the target farther down the zone will not solve that problem. This calculator brings the suggested exchange forward when its model predicts that the receiver would otherwise pull away. A fading incoming runner, a faster receiver or inconsistent timing may all call for an earlier target.
Use the training steps above to test the balance between speed and consistency.
Common questions
Are runners of significantly different heights an issue?
They can make hand placement more challenging, but height alone is not a reason to rule out a pairing. The practical question is whether the passer can place the baton into the receiver's steady hand while both keep sprinting without awkward changes in posture.
Evidence: there is no reliable evidence on how height differences between runners affect changeover performance. The guidance below is based on practical coaching judgement.
Practical coaching guide: the steps below are common-sense adaptations, rather than a research-tested solution to height differences.
- Check the actual target and reach. Start stationary, then walk. Have the receiver present the open hand as close to their own shoulder height as comfortable, with the thumb down. Check that the passer can push the baton into the palm without either runner crouching, twisting or leaning sideways. A shorter passer reaching a taller receiver's hand may face a different challenge from the reverse pairing; test each exchange in its actual direction.
- Find a comfortable, repeatable placement. Let the passer adjust the delivery arm to the receiver's target while retaining a forward push. Keep the receiver's hand steady; avoid asking them to search for the baton or forcing an uncomfortable shoulder position. Revisit the technique demonstration together.
- Build speed and check again. Progress from walking to controlled running, then fully warmed-up race-speed attempts with recovery. Film from the side to check for missed first contacts, prolonged reaching or slowing. A pass that works standing still has still to prove reliable at speed.
- Choose the pairing from what you observe. If repeated practice still requires awkward posture or produces unreliable transfers, trial a different leg order and compare the whole team's exchanges. Consider bend running, acceleration and baton skills alongside height. Retest go marks whenever the pairing or effective reach changes.
Why not use other forms of relay exchange?
For Australian athletes, follow the Australian Athletics recommendation in this guide: teach the Push Pass. The receiver offers a steady, open hand and the passer pushes the baton forwards into it. Upsweep and Downsweep use different hand positions and delivery actions; they are included above so coaches can recognise them.
Evidence: we do not have reliable comparative evidence establishing that the Push Pass is always faster or safer than the other methods. Coaching recommendations should not be presented as proof of superiority. The 2016 Athletics Scotland conference handout, for example, discusses advantages and disadvantages of several methods; it is coaching guidance, not a controlled comparison proving one method best.
Practical coaching guide: teaching one method gives the squad a shared hand target, delivery action and coaching language. That can simplify practice when athletes change legs or partners. This is a practical reason for consistency, rather than a demonstrated performance advantage. Spend practice time refining the call, steady hand, secure grip and timing at running speed before introducing more variations.
If an exchange is unreliable, check the pair's spacing, call and hand presentation using the Push Pass coaching steps, then test and adjust at speed. A different pass name alone will not resolve those problems.
Before starting, should the receiver look back to the side or underneath themselves in a three-point stance?
Choose the position that gives the athlete a clear view of the incoming runner reaching the go mark and lets them accelerate without hesitation. Looking back to the side is a sensible starting point for beginners. Looking underneath the body or between the legs in a three-point stance is an option, rather than a position every receiver needs to learn.
Evidence: we have not identified reliable research directly comparing these two viewing positions for changeover performance. Coach John Brumund-Smith's discussion of outgoing-runner stances illustrates both and highlights the need to balance visibility with starting effectively. This is coaching guidance, not proof that either head position produces faster exchanges.
Practical coaching guide:
- Start with a clear sightline. Try looking back over the inside shoulder from a comfortable standing or crouched stance, keeping the feet directed down the lane. Check the view in the actual exchange position, including on the bend. The athlete needs to see the incoming runner approach and reach the mark without moving their head repeatedly to find them.
- If using three points, test both views. Looking back to the side or underneath can be considered if comfortable. Avoid forcing the neck into an extreme position. If an under-body view is blocked by the athlete's arm or legs, or requires lifting or turning the head again before deciding to go, adjust the stance or use the clearer side view.
- Once the mark triggers the start, commit forwards. Bring the head into line with the accelerating torso as the athlete pushes away. Do not cue an abrupt head lift or an upright posture: looking forwards here means facing the running direction, with the gaze naturally down the track during early acceleration. Do not turn back again to check the passer; present the receiving hand on the agreed call.
- Compare repeated attempts. With a full-speed incoming runner and adequate recovery, film the mark and the receiver's first movement. Check whether they leave consistently on the agreed cue and accelerate straight ahead. Compare several starts rather than choosing the position that looks most like a block start. When the setup changes, recheck the go mark and the complete exchange.
At what age should athletes use a three-point start?
Begin with a standing start and progress according to readiness, rather than a set age. Athletes should initially learn to watch the incoming runner reach the go mark, push away decisively and accelerate straight ahead. Introduce a three-point stance as they develop the strength, balance, coordination and technique to use it comfortably and consistently.
Evidence: we have not identified reliable evidence establishing a specific age for introducing a three-point relay start. The coaching discussion of outgoing-runner stances recommends a standing setup for many developing athletes; it does not establish an age threshold. The progression below is practical coaching guidance.
- Build the standing start first. Use a balanced split stance with feet directed down the lane. Practise seeing the mark, leaving on the agreed cue and using both arms to accelerate. Develop these skills alongside age-appropriate strength and movement activities.
- Check readiness for three points. The athlete should be able to support the stance comfortably through the legs and supporting arm, remain steady while watching the approach, and push away without stumbling or taking an extra step to regain balance. A clear view of the mark matters as much as the shape of the stance.
- Introduce it gradually. Rehearse the position and first few steps before adding an approaching runner, then progress towards race-speed exchanges with recovery. Return to standing if the athlete loses the sightline, hesitates, experiences discomfort or struggles to control the start.
- Keep the setup that works reliably. Compare repeated starts and complete exchanges. A standing start remains a valid choice for older athletes too; three points is an option, not a compulsory graduation. Recheck the go mark whenever the starting stance changes.
Should the fourth leg be the fastest runner?
Not necessarily. Choose the order that produces the best complete relay, rather than automatically saving the fastest runner for last. For people who watched Usain Bolt's era, the enduring image of him anchoring Jamaica's 4x100 m team may make it feel intuitive that the anchor should always be the team's “star”. That is a memorable example, rather than a rule for selecting every team.
Your fastest athlete may be a good anchor, but their speed may also be valuable on an earlier leg. The fourth runner needs to receive reliably, sprint strongly along the straight and run through the finish.
Evidence: a mathematical analysis by Ward-Smith and Radford (2002) predicted the fastest times with the fastest runner first and the two slower runners on the final two legs. This was a model of elite male performance under the former zone arrangement, not an experiment proving the best order for every team. It challenges the assumption that the fastest athlete must run fourth; it does not establish a universal replacement rule.
Practical coaching guide: use sprint times as one input, then assess the demands of each leg.
- Match skills to the whole team. Consider starting and bend running for leg one; receiving, passing and sustained speed for the middle legs; and a reliable final reception and strong straight sprint for the anchor. Legs one and three involve bends; legs two and four are mainly straights.
- Consider the exchanges. The anchor receives but does not pass onwards. An athlete who receives well but finds delivering difficult may suit fourth, provided their running performance supports that choice. The fastest individual 100 m time cannot tell you which three pairings will exchange most reliably.
- Value confidence without labelling athletes. An anchor who stays composed in a close race can be useful, but that is a coaching consideration, not proof that they should be your fastest runner. With developing athletes, practise different roles rather than permanently reserving anchor for the fastest child.
- Test realistic alternatives. Give each order enough practice to establish its marks. Compare repeated exchanges and, where practical, complete relay times under similar conditions with adequate recovery. Judge the total performance and consistency, rather than one dramatic final straight.
When should the incoming runner call “Hand”?
Call just before the pair comes within passing reach, allowing time for the receiver to hear the call and present a steady hand. The aim is to place the baton as that target becomes available, without the receiver spending several strides running with an arm held back. Do not wait until the baton is already at the receiver's body before calling.
Coaching guidance: the Athletics Scotland conference handout assigns the verbal cue to the incoming runner and tells the receiver to present a steady hand on the cue. It does not establish a universal calling distance. We have not identified reliable evidence prescribing one exact distance or number of strides for every pair; the timing advice here is practical coaching guidance.
- Agree on one short, distinct call. Use “Hand” or another familiar word consistently. The incoming runner gives it clearly; the receiver keeps accelerating with both arms until hearing it. The go mark triggers the receiver's start; the call triggers the receiving hand.
- Allow for the response. The passer judges the closing gap and calls early enough for the hand to come back before delivery. Practise this at walking and controlled running speeds first, then refine it at race speed. Timing learned while jogging will need checking when the pair is moving faster.
- Watch what happens after the call. If the receiver holds the hand back for several strides before the baton arrives, the call may be too early or the pair may still be too far apart. If the passer catches the receiver before the hand is ready, the call may be too late. Check spacing and the receiver's response before assuming the call is the only problem.
- Refine it together. Film with sound where possible and compare the call, hand presentation and first baton contact across several attempts, with adequate recovery. Adjust the call timing separately from the go mark so you can see what helped. Keep enough zone remaining to complete the transfer.
What should athletes do if the first attempt to place the baton misses?
Keep running and give the passer a steady target for another controlled placement. If the passer still holds the baton, the receiver should keep the receiving hand open and steady rather than reaching around to find it. The passer keeps looking at the palm, retains control of the baton and attempts the forward placement again if still within reach and with room to finish.
Practical coaching guide: this is a rehearsed response to a missed placement, not a guarantee that every exchange can be recovered. We have not identified reliable comparative evidence establishing the best recovery action for every situation. Practise the response at controlled speeds before adding race-speed pressure.
- Receiver: keep the target still. Continue running in the agreed part of the lane, facing forwards. Avoid turning to look, waving the hand or repeatedly pulling it forwards and reaching back. Those movements change the target just as the passer tries again.
- Passer: retain, aim and place. Keep running and keep hold of the baton until the receiver has secured it. Re-aim at the open palm and use a controlled forward push. Do not throw the baton towards the hand or release it simply because it has touched the fingers.
- Plan room for a second attempt. In training, leave space beyond the intended exchange point for the handover to finish. A plan that only works with perfect first contact leaves little room for error. If misses recur, review the call, hand stability and pair spacing before moving the target later.
- Recognise the limit. Continuing to run does not mean blindly chasing an unreachable receiver. If the gap is opening or the zone is running out, the planned exchange has broken down. Do not rehearse a sudden stop or turn as the standard rescue; review the failed attempt and reset the pairing's timing in training.
A missed placement is different from a dropped baton. If the baton falls, follow the dropped-baton guidance in Essential rules.
Should the receiver reach back after a set number of steps or wait for the call?
For the Push Pass taught here, wait for the incoming runner's agreed call. Accelerate using both arms, then present a steady receiving hand on the call. The go mark tells the receiver when to start; the call tells them when the passer is ready for the hand to appear.
Why the call matters: the incoming runner can see the receiver and judge the closing gap. Their call should allow time for the hand to come back before they place the baton. A step count records what the receiver has done; it does not tell them whether the passer is close enough to deliver.
Coaching guidance: the Athletics Scotland conference handout describes a verbal cue from the incoming runner and hand presentation in response to a cue. It does not prove that a call outperforms a fixed step count in every setting. The advice below is the practical approach used in this guide.
- A fixed count cannot account for every approach. The receiver may leave slightly earlier or later, accelerate differently, or meet an incoming runner travelling at a different speed. Reaching back on the same step can therefore produce a hand too early, held back while the passer catches up, or too late for a passer already within reach.
- Use counts for observation rather than automatic hand presentation. A coach can note the usual number of steps before the call to understand a pair's rhythm or spot a change. That pattern should not override the agreed call during the exchange.
- Make the call dependable. Agree on one short word, practise making it clearly and rehearse the receiver's response. If the receiver repeatedly cannot hear it, address audibility and timing in practice rather than expecting them to guess or turn back. See the question on when to call “Hand” above.
Evidence and references
What one team found
In the Hong Kong team study, the same four runners improved from 41.34 to 40.28 seconds after resetting their go marks. Their previous marks were 7.5 to 8.5 m, compared with calculated distances of 9.2 to 9.7 m. This is one team's result, not an expected improvement for every team (Zhang and Chu, 2000).
How this is worked out
Each runner's top speed is estimated from their 100 m time using the standard exponential acceleration model, where speed climbs towards a maximum with a time constant of about 1.1 s (Clark and Ryan 2022). The incoming runner holds a steady speed through the zone. The calculator finds how long the outgoing runner takes to reach the exchange point, how far the incoming runner travels in that time, and sets the go mark so the gap between them closes to arm's length exactly there.
With the speeds measured in the Hong Kong team, this method gives a go mark of about 9.4 m against the 9.47 m worked out in the study (Zhang and Chu 2000).
The model is a starting point. It can't see reaction time, nerves, a bend in the track or a runner who fades, which is why every mark needs testing at full speed.
What this research can't tell you
The measured go marks come from one men's team at one local meet, and the model assumes the incoming runner holds a steady speed and the outgoing runner accelerates the same way every time. It doesn't account for reaction time, the bend on the first and third exchanges, or nerves on race day. Women's and junior teams will have different speeds and marks, which the calculator handles, but the 1.1 s acceleration constant is an average that some runners won't match.
References
- Athletics Ireland: relay coaching guide. Push Pass receiving-arm and hand-position guidance.
- Salo, A. (2001) Running velocities and baton change-overs in 4 x 100 m relay exchanges. 19th International Symposium on Biomechanics in Sports.
- Karlsson, N. and Lunander, A. (2024) A stochastic analysis of the 4 x 100 m relay. International Journal of Sports Science & Coaching.
- Athletics Scotland (2016) Coaching the 4x100 Relay. Coaching conference handout, Glasgow.
- Clark, K.P. and Ryan, L.J. (2022) Hip torque is a mechanistic link between sprint acceleration and maximum velocity performance: a theoretical perspective. Frontiers in Sports and Active Living, 4, 945688.
- Ward-Smith, A.J. and Radford, P.F. (2002) A mathematical analysis of the 4 × 100 m relay. Journal of Sports Sciences, 20(5), pp.369–381.
- World Athletics (2023) Competition and Technical Rule Amendments, August 2023 (Rule 24: Relay Races).
- Zhang, B.-M. and Chu, D.P.K. (2000) The study of the optimal exchange technique in 4x100m relay. Proceedings of the 18th International Symposium on Biomechanics in Sports.
Figures and citations checked against the published sources, October 2026.
