Ask young throwers the best release angle and most say 45 degrees. In every throwing event it's lower, and the reasons differ between the shot, discus, javelin and hammer. Pick an event. Everything on this page follows your choice.
What the research says about release
Every throw follows the same physics once it leaves the hand: distance depends on release speed, release angle and release height. Speed counts most, because distance rises with its square. 45° is only the best angle when release and landing are at the same height, and in every throwing event the implement leaves the hand above the ground.
The bigger reason is human. Throwers can't produce the same speed at every angle. In shot-putters, release speed fell about 1.7 m/s for every radian (about 0.3 m/s per 10°) of extra angle, and about 0.8 m/s per metre of extra release height (Hubbard, de Mestre and Scott, 2001). Because that trade differs between athletes, each thrower has their own best angle. Linthorne (2001) found it matched each college shot-putter's preferred angle. In elite discus throwers it ranged from 35° to 44° (Leigh and colleagues, 2010).
Where does release speed come from? A 2021 review found the main biological factors were the amount of lean body mass, how strongly the main muscles are switched on during the throw, and the share of fast-twitch (type II) fibre area. All of these can be built with long-term training (Zaras, Stasinaki and Terzis). In the javelin, up to 70% of release speed is built in the final tenth of a second (Morriss and Bartlett, 1996).
Consistency matters too. In a study of elite and sub-elite shot-putters using both glide and rotational techniques, throws were longer when the athlete's technique varied less from throw to throw (Mastalerz and Sadowski, 2022). Then there's the air: barely relevant for the shot and hammer, a big factor for the discus and javelin.
True or false?
Test what you think you know before you start. Tap an answer to see what the research says.
45° is the best release angle for the shot put.
Release height and the speed lost at steeper angles both push the best angle lower, into the mid-to-high 30s for most senior throwers.
A discus can fly further into a headwind than with a tailwind.
Lift and drag rise when the discus is thrown into the wind. Calculations support throwers' experience that it travels several metres further (Frohlich, 1981).
Releasing 10 cm higher is an easy way to find distance.
In the shot, 10 cm more height adds only about 8 cm, while 0.5 m/s more speed adds over a metre.
A champion's release angle suits every thrower.
Best angles are individual. Elite discus throwers' best angles ranged from 35° to 44°, and their competition angles weren't always optimal even for themselves (Leigh et al., 2010).
Flight simulator: shot put
Set the release speed, angle and height. The bright arc is the throw. The dashed arc is the same thrower at their best angle.
Try an example
Made-up examples to show the pattern, not real athletes.
Side view
Distance at every angle
Go deeperShow less
The range equation
Once the implement leaves the hand, and if air is ignored, distance depends on three things: release speed v, angle θ and height h. Range = v cosθ ÷ g × (v sinθ + √(v² sin²θ + 2gh)).
Speed appears squared, so a 10% faster release adds roughly 20% to the distance. Angle and height enter in a much weaker way.
Why height pulls the angle down
45° is the best angle only when release and landing are at the same height. Releasing above the ground gives the implement extra time to fall, which favours a flatter, faster horizontal path.
The effect is biggest when the throw is short compared with the release height. That's why young and novice throwers have lower best angles than seniors in the same event, even in textbook physics.
Why speed drops at higher angles
Pushing upwards means working against gravity, and the body is built to produce more force driving forwards than lifting upwards. Linthorne's models explain the speed loss through the thrower's build and strength.
Shot-putters who released higher also released slower: about 0.8 m/s less for every metre of extra height, on top of the speed lost to a steeper angle (Hubbard and colleagues).
Sector view
The same throw from above. Angle it left or right to see how little room there is: the shot, discus and hammer sectors are 34.92° wide, the javelin's 28.96°.
Go deeperShow less
Fair or foul
The implement must land fully inside the sector lines. Landing on a line counts as a foul. The thrower also has to stay in the circle or behind the javelin arc until the implement lands, then leave from the back half.
How it's measured
Officials measure from the nearest mark the implement makes to the inside edge of the circle or arc, along a line to its centre. Distances are recorded to the whole centimetre below.
Why direction matters in training
A throw that lands near a sector line has the same measured distance as one down the middle, but it's one small error away from a foul. Tracking where throws land in training shows which athletes are drifting and need a more consistent line.
What adds distance
For the throw you've set up, here's what each change would add. Move the sliders above and watch the numbers.
Strength, power and a better transfer of speed through the body.
Technique work on the line of the release.
A taller, more extended finish. Useful, but there isn't much of it to find.
Go deeperShow less
Why speed dominates
Distance rises with the square of release speed, so the gain from extra speed keeps growing as the athlete gets faster. Height adds in a much smaller way, and once a thrower is near their best angle, a few degrees either side changes almost nothing.
Where speed comes from
In the javelin, as much as 70% of release speed is built in the final tenth of a second, through the block of the front leg and the transfer of momentum up the body. In the discus, the speed gained in the final double-support phase explained the most about distance in male throwers.
What to test
Measure release speed and angle across several throws from video, and track distance alongside. If speed rises over a training block, distances should follow, even if the angle doesn't change.
The research: shot put
What the studies say for this event. Switch events at the top of the page to compare.
Go deeper on this eventShow less
Air and wind
The simulator leaves air out. That's close to right for the shot and hammer, and wrong for the discus and javelin, which fly.
Go deeperShow less
Lift and drag
Air pushes back on a moving implement (drag) and can also push it upwards (lift) if it's shaped and angled to do so. A shot or hammer is too heavy and compact for either to matter much.
A discus and javelin are shaped to create lift. Their flight depends on the release angle, the angle the implement is tilted at, and the difference between the two, called the angle of attack.
The discus in a headwind
Throwing into a headwind raises the air speed over the discus, so lift rises. Calculations show a well-thrown discus can travel several metres further into a headwind than with the wind behind it. In large head and tail winds, the best release strategy changes completely.
The javelin
The men's javelin was redesigned in 1986 to move its balance point, so it pitches nose-down sooner and glides less. Release angle, attack angle, pitch rate, flutter and wind all affect its flight, which is why simple physics is only a rough guide.
Implement weights
Australian Athletics weights for able-bodied competition. Pick an age group to see all four implements.
Source: Australian Athletics Technical Specifications (implement weights updated October 2023). Little Athletics, Masters and para athletics use their own specifications.
Go deeperShow less
How the weights step up
For boys and men, the shot and hammer go from 3 kg at U14 to 4, 5, 6 and finally 7.26 kg at open level. Girls and women throw 3 kg until U20, then 4 kg.
The javelin and discus step up in smaller increments, with the biggest jump for men at U20.
Moving up a weight
A heavier implement means a slower release, and the best angle drops slightly too. Expect distances to fall when an athlete moves up an age group, and judge progress against others throwing the same weight.
Check the meet
Little Athletics, schools, Masters and para competitions use their own specifications, so check the weight for each meet before the athlete travels.
Notes and references
Speed first, angle second, height last.
Every thrower has their own best angle.
Measure several throws before changing anything.
How the simulator works
The flight uses the equation for a projectile released above the ground, with gravity at 9.81 m/s² and no air. The "speed lost per 10° higher" slider sets how much release speed the thrower gives up for a higher angle. For the shot it starts at 0.3 m/s (1.7 m/s per radian, the rate Hubbard and colleagues measured), and the release point also moves back at their measured 1.7 m per radian. The discus and hammer show the same trade in studies, at a different rate for each thrower, so those start at zero and you can set your own.
What this research can't tell you
The release relationships come from small groups of trained throwers. Discus and javelin flights depend heavily on air, attack angle and spin, which this simulator doesn't model, so treat their distances as a rough guide. Use the tool to set priorities, not to predict a result.
References
- Mastalerz, A. and Sadowski, J. (2022) Variability of performance and kinematics of different shot put techniques in elite and sub-elite athletes: a preliminary study. International Journal of Environmental Research and Public Health, 19(3), 1751.
- Zaras, N., Stasinaki, A.N. and Terzis, G. (2021) Biological determinants of track and field throwing performance. Journal of Functional Morphology and Kinesiology, 6(2), 40.
- Australian Athletics (2025) Technical specifications: implement weights for able bodied competition.
- Bartlett, R.M. and Best, R.J. (1988) The biomechanics of javelin throwing: a review. Journal of Sports Sciences, 6(1), pp.1–38.
- Castaldi, G.M., Borzuola, R., Camomilla, V., Bergamini, E., Vannozzi, G. and Macaluso, A. (2022) Biomechanics of the hammer throw: narrative review. Frontiers in Sports and Active Living, 4, 853536.
- Frohlich, C. (1981) Aerodynamic effects on discus flight. American Journal of Physics, 49, pp.1125–1132.
- Hay, J.G. and Yu, B. (1995) Critical characteristics of technique in throwing the discus. Journal of Sports Sciences, 13(2), pp.125–140.
- Hubbard, M. and Cheng, K.B. (2007) Optimal discus trajectories. Journal of Biomechanics, 40(16), pp.3650–3659.
- Hubbard, M., de Mestre, N.J. and Scott, J. (2001) Dependence of release variables in the shot put. Journal of Biomechanics, 34(4), pp.449–456.
- Leigh, S., Liu, H., Hubbard, M. and Yu, B. (2010) Individualized optimal release angles in discus throwing. Journal of Biomechanics, 43(3), pp.540–545.
- Linthorne, N.P. (2001) Optimum release angle in the shot put. Journal of Sports Sciences, 19(5), pp.359–372.
- Morriss, C. and Bartlett, R. (1996) Biomechanical factors critical for performance in the men's javelin throw. Sports Medicine, 21(6), pp.438–446.
- Viitasalo, J., Mononen, H. and Norvapalo, K. (2003) Release parameters at the foul line and the official result in javelin throwing. Sports Biomechanics, 2(1), pp.15–34.