What is Medicine Ball Throw?

What is Medicine Ball Throw?

A medicine ball throw is any drill in which you launch a weighted ball as far or as hard as you can, and coaches use the same movement two ways: as a training exercise to build explosive power, and as a field test to measure it. The ball itself is just a round, soft-shelled weight, usually 2 to 5 kg, that you can throw safely without a barbell's momentum problem.

Because the ball actually leaves your hands, the movement is genuinely ballistic — you accelerate it through the entire range of motion instead of decelerating at the end the way you must with a dumbbell or barbell, so it trains the same fast, forceful pattern your body uses to push someone off you, throw a punch, or drive a bat through contact. Strength coaches reach for it because a 1RM test tells you how much force you can produce slowly, but says almost nothing about how much force you can produce fast, and fast force production, power, decides most sporting outcomes. The test versions (seated chest pass, standing chest pass, overhead throw, rotational throw) each isolate a different segment of the kinetic chain, so which one a coach picks depends on whether they are chasing upper-body pushing power in isolation or the full-body, ground-up power a thrower or hitter actually needs on the field.

How it works

The medicine ball throw works by asking your muscles to produce maximum force in minimum time rather than maximum force over unlimited time, which is the working definition of power (power = force × velocity). When you throw a 3 kg ball for distance, your nervous system recruits the fastest, highest-threshold motor units first because the ball is light enough to move quickly, then your prime movers (pectoralis major and triceps in a chest pass; obliques, lats, and hip rotators in a rotational throw) contract concentrically through the full range and release the ball at the point of peak velocity.

Distance thrown becomes a proxy for that release velocity: basic projectile physics says a ball launched around 45 degrees travels farther the faster it leaves your hands, so researchers can back-calculate an estimated release velocity from the measured distance alone. The test correlates moderately with 1RM bench press (r = 0.68 to 0.73) because both draw on the same prime movers, and with isometric trunk-rotation torque (r = 0.60 to 0.74) for the rotational version, but the relationship is never perfect, because power depends on rate of force development and neuromuscular coordination, not only on how much weight you can move. That is exactly why coaches track it separately from strength: an athlete can add 20 kg to their bench press and see no change in throw distance if they never train the ballistic, fast-twitch end of the force-velocity curve.

The formula

Estimated release velocity v = √(d × g), where d = throw distance in meters and g = 9.81 m/s² — assumes a 45° release angle and ignores release height

This is the standard projectile-motion estimate researchers use to back-calculate velocity from throw distance when no radar gun or velocity tracker is available. Because release height above the ground is ignored, it slightly underestimates true release velocity.

How to apply it

• Fix the ball mass before you start: Pick one ball weight, most commonly 2 kg for youth and older adults or 3 kg for adult athletes, and never change it between sessions. A heavier ball on retest day makes an athlete look weaker even if their power genuinely improved.
• Warm up with submaximal throws: Perform 4 to 6 progressively harder throws before recording a score. The ballistic nature of the movement means the shoulder and trunk need a real rehearsal, not just a general warm-up, or the first max attempt underestimates true output.
• Take the best of three throws: Allow three maximal attempts with 30 to 90 seconds of rest between them and record only the longest. A single throw is noisy; best-of-three is the standard protocol behind the published reliability data of ICC 0.94 to 0.99.
• Measure to first ground contact, not the bounce: Mark where the ball first strikes the floor, not where it rolls or bounces onward. Measuring the bounce inflates the distance and is the single most common scoring error coaches make in the field.
• Match the variant to the anchor you need: Use the seated chest pass when you want to strip out leg drive and trunk rotation and isolate pure upper-body pushing power. Use the standing or rotational version when you want the full kinetic chain a real throw or swing actually uses.
• Retest on the same schedule you'd retest a 1RM: Re-administer the throw every 4 to 8 weeks during a power block. Research on medicine-ball training shows realistic gains of roughly 8 to 15% in throw distance over 6 to 8 weeks of targeted plyometric and pressing work.

Types

Worked example

Say a college volleyball outside hitter throws a 3 kg seated chest pass and averages 5.5 m at the start of an 8-week power block built around rotational medicine ball work and speed-focused pressing. Retesting every 4 weeks shows whether the training is actually raising ballistic output, not just strength.

An 8 to 15% gain over 6 to 8 weeks of focused medicine-ball, plyometric, and pressing work is a realistic, well-documented response. A bigger jump usually means the athlete had a lot of untrained power sitting on top of decent strength; a smaller one means the training block needs more ballistic-specific work, not just heavier lifting.

Medicine ball throw vs bench press 1RM

The two overlap moderately (r = 0.68 to 0.73) because both tax the chest, shoulders, and triceps, but a strong bench presser is not automatically a powerful thrower — power needs its own ballistic stimulus to develop, not just heavier loading.

By goal

• Team-sport and throwing athletes: Pick the variant that matches the sport pattern: rotational throw for baseball, tennis, and golf; overhead throw for volleyball and swimming; standing chest pass for football linemen and rugby forwards. Retest every 4 to 6 weeks across a training block.
• General strength and hypertrophy lifters: Add 2 to 4 sets of 3 to 5 explosive throws as an opener or finisher on push day, twice a week, using a ball light enough that every rep stays fast. This trains the ballistic end of the force-velocity curve that heavy pressing alone never touches.
• Older adults and rehab populations: Use the seated chest pass with a light 1 to 3 kg ball to track functional pushing power, which predicts real-world tasks like catching yourself in a fall or pushing up from a chair, and is specifically validated in adults over 65.

Common misconceptions

• "It's just a warm-up drill, not a real test." Published protocols report test-retest reliability of ICC 0.94 to 0.99 for the seated and overhead throw, on par with a vertical jump or sprint test. Coaches use it as a standalone power metric, not a warm-up filler.
• "A heavier ball trains power better." Power training needs speed, not just load. Once the ball gets too heavy to move fast, you have turned a power drill into a slow strength drill; 2 to 5 kg is the standard range specifically because it stays light enough to throw ballistically.
• "Throw distance only reflects arm strength." The seated version does isolate the arms, chest, and shoulders, but the standing, overhead, and rotational versions pull power from the legs, hips, and trunk first, the same ground-up sequence used in a real throw, punch, or swing.
• "Any measuring method gives the same result." Changing the ball mass, measuring the bounce instead of first contact, or skipping the warm-up throws all shift the score independent of any real change in power, so the protocol must stay identical from test to retest.

Related terms

Medicine Ball Throw FAQ

What is a medicine ball throw test used for?

A medicine ball throw test measures upper-body or rotational power by scoring how far you can throw a weighted ball. Coaches use it to track explosive output across a training block, screen athletes for power deficits relative to their strength, and predict performance in throwing, hitting, and contact sports.

What weight medicine ball should I use for power testing?

Most protocols use 2 kg for youth, older adults, and female athletes, and 3 kg for adult male athletes, with 4 to 5 kg used in some sport-specific or advanced protocols. The exact weight matters less than keeping it identical every time you retest, since changing mass invalidates the comparison.

How far should you be able to throw a medicine ball?

It depends heavily on the variant, ball mass, and population. With a 3 kg ball, an adult male overhead throw averaging 7 to 9 m is roughly average and above 12.5 m is elite; a seated chest pass with a 4 kg ball around 7 to 8 m is typical for college-level athletes.

Is the medicine ball throw a valid test of power?

Yes. Published research reports test-retest reliability of ICC 0.94 to 0.99 for the seated and overhead versions, plus moderate correlations with bench press strength (r = 0.68 to 0.73) and isometric trunk-rotation torque (r = 0.60 to 0.74), supporting it as a legitimate field measure of ballistic power.

What is the difference between a medicine ball throw and a medicine ball slam?

A throw is released for maximum distance and scored with a tape measure, training the concentric, propulsive side of power. A slam is driven straight down into the floor with no distance score, training explosive force output plus the deceleration and eccentric control a distance throw does not demand.

How many throws should you record in a medicine ball test?

Standard protocol allows three maximal attempts with 30 to 90 seconds of rest between them, and only the single best distance counts. Averaging all three, or recording the first attempt, underestimates true power because the first throw often serves as extra warm-up rather than a maximal effort.

Can the medicine ball throw test replace a vertical jump test?

No. They measure power in different planes and body regions — the vertical jump tests lower-body power, while the medicine ball throw tests upper-body or rotational power. A complete power profile uses both rather than one substituting for the other.

How often should you retest the medicine ball throw?

Every 4 to 8 weeks during a dedicated power training block is standard, matching the timeline coaches use for other performance tests like the vertical jump or sprint. Research on medicine-ball training shows realistic gains of 8 to 15% in throw distance over that window.

Does the medicine ball throw train the whole body or just the arms?

It depends on the variant. The seated chest pass isolates the arms, chest, and shoulders by removing leg and trunk contribution, while the standing, overhead, and rotational throws pull power from the legs and hips first, the same ground-up sequence a real throw or swing uses.

Can older adults safely do the seated medicine ball throw test?

Yes, it is specifically validated in adults over 65 as a safe, low-impact way to track upper-body power, which predicts real-world tasks like pushing up from a chair or catching yourself in a fall. Use a light 1 to 3 kg ball and stop if there is any shoulder pain.

References

1. Sayers MGL, Bishop S. Reliability of a New Medicine Ball Throw Power Test. Journal of Applied Biomechanics, 2017;33(4):311-315. PubMed 28121227
2. Strand KL, et al. Validity and Reliability of the Seated Medicine Ball Throw as a Measure of Upper Body Power in Older Women. Journal of Strength and Conditioning Research, 2023;37(4):902-908. PubMed 35876437
3. Harris C, Wattles AP, DeBeliso M, Sevene-Adams PG, Berning JM, Adams KJ. The seated medicine ball throw as a test of upper body power in older adults. Journal of Strength and Conditioning Research, 2011;25(8):2344-2348. PubMed 21572350
4. Lockie RG. The Seated Medicine Ball Throw Performed by Law Enforcement Recruits — Normative Data and Training Implications. NSCA TSAC Report
5. Seated Medicine Ball Throw Calculator — Upper Body Power Test. Topend Sports
6. Overhead Medicine Ball Throw Test Calculator for Athletes. Topend Sports
7. Rotational Power Ball Throw Calculator — SPARQ Test for Athletes. Topend Sports
8. Establishing Normative Reference Values for the Utah Seated Medicine Ball Throw Protocol in Adolescents. The Sport Journal