Wall Ball vs Medicine Ball vs Slam Ball: What's the Difference?

Training Guide · July 2026

By the ATE Expert Team · Reviewed by Himanshu Anand, Founder & Managing Director, Anand Track & Field Equipment Pvt. Ltd.
Updated July 2026 · 26 min read

Wall ball vs medicine ball vs slam ball: what's the difference?

Walk into any CrossFit box, functional-training studio or well-stocked gym and you'll find three round, weighted balls that look deceptively similar — and get confused for one another constantly. The medicine ball, the wall ball and the slam ball are three genuinely different tools, built differently, for different jobs. Use the wrong one and you'll either damage the ball, damage your floor, or simply not get the training effect you're after. Use the right one and each becomes a superb tool for building power, conditioning and full-body strength.

This guide settles the confusion completely. We'll define each ball precisely, explain exactly how they're constructed and why that construction matters, compare them across every factor that counts — bounce, size, weight, grip, durability, noise and use case — and then show you which one (or which combination) you actually need for CrossFit, Hyrox, athletic power, conditioning, rehab or a home gym. We'll also cover how to choose the right weight, what separates a quality ball from a cheap one that splits at the seams, and the best exercises for each. By the end you'll never mix them up again — and you'll know exactly what to buy. All three live in ATE's CrossFit equipment and functional ranges.

The three balls at a glance

Here's the fast comparison — the differences that actually decide which one you need. We unpack every row in detail below.

📋 On this page

• Quick answer: the core difference
• What is a medicine ball?
• What is a wall ball?
• What is a slam ball?
• Construction: why they're built differently
• Bounce: the deciding factor
• Size & weight compared
• Best exercises for each
• Which one should you buy?
• Can one replace another?
• How to choose the right weight
• What makes a quality ball
• Care & durability
• Kitting out a gym: how many of each
• Common mistakes
• FAQs

Quick answer: the core difference in plain terms

If you remember one thing, remember this: the three balls differ by what you're meant to do with them, and their construction follows from that.

• A medicine ball is a firm, general-purpose weighted ball. You throw it, pass it, hold it, and use it for rotational and explosive work. It has some bounce, so you can throw it against a solid wall or to a partner and catch the rebound, but it's not built to be smashed into the floor.
• A wall ball is bigger and soft. It's specifically designed to be thrown high onto a wall and caught on the way down — the CrossFit "wall ball shot" — over and over. Its soft, padded shell makes those repeated catches easy on the hands and safe if it hits you.
• A slam ball is smaller, denser and has no bounce at all. It's built to be lifted overhead and slammed into the floor at maximum force, again and again, without bouncing back up into your face. The dead weight is the whole point.

Everything else — the shell material, the size, the weight range, the filling — flows from those three jobs. A slam ball that bounced would be dangerous; a wall ball that was hard and small would shred your hands on every catch; a medicine ball that was soft and huge would be useless for a chest pass. Now let's look at each in detail.

What is a medicine ball?

The medicine ball is the oldest and most general of the three — weighted training balls have been used for strength and rehabilitation for well over a century, and the modern medicine ball is the direct descendant. It's a firm, round weighted ball, usually somewhere between the size of a football and a basketball, in weights typically from 1 kg up to around 12 kg. The defining characteristics are its firm shell and its moderate bounce: it holds its shape, feels solid in the hand, and rebounds predictably off a wall, the floor or a partner's hands.

Construction varies. Traditional medicine balls used leather over a firm filling; modern ones are commonly rubber, vinyl or a durable synthetic shell over a dense core, and many have a slightly textured surface for grip. Some are designed with more bounce (almost like a heavy basketball) for rebound drills, while others are firmer with less bounce for holding and pressing work. What unites them is versatility: the medicine ball is the Swiss-army knife of weighted balls.

What a medicine ball is used for

Because it's firm and moderately bouncy, the medicine ball excels at throwing, catching and rotational movements. Classic uses include:

• Rotational and power throws — side throws against a wall for oblique and rotational power, hugely popular with athletes in rotational sports (cricket, tennis, golf, boxing, throwing events).
• Chest passes and overhead throws — explosive upper-body power, often done with a partner or a solid rebound wall.
• Slams (light) — some medicine balls tolerate light slamming, but this is really the slam ball's job.
• Loaded movements — holding the ball for weighted sit-ups, Russian twists, lunges, squats and core work.
• Rehabilitation and prehab — light medicine balls are a staple of physiotherapy and return-to-sport programmes for controlled, low-impact loading.

The medicine ball's strength is its adaptability across power, core and rehab work. Its limitation is that it's not specialised: it's not soft enough for endless wall-ball catches, and not dead enough for full-force floor slams. For those, you want the specialist tools. You'll find medicine balls alongside ATE's CrossFit and exercise ball ranges.

What is a wall ball?

The wall ball is the youngest and most specialised of the three, and it exists because of one movement: the wall ball shot, a cornerstone of CrossFit and functional conditioning. In a wall ball shot you hold the ball at your chest, drop into a full front squat, and drive up explosively to throw the ball high onto a target on the wall (commonly 9 or 10 feet up), then catch it on the way down straight into the next squat. Done for reps — sometimes dozens or hundreds in a workout — it's a brutal full-body conditioning movement that hammers the legs, shoulders and lungs.

The wall ball is engineered specifically for that. It's large (around 35–36 cm diameter, noticeably bigger and bulkier than a medicine ball of the same weight) and, crucially, soft and padded. The oversized, forgiving shell — typically a thick synthetic or vinyl cover over a soft, shock-absorbing filling — does three things: it's easy and comfortable to catch repeatedly without hurting the hands, it's safe if it drops on you or a training partner, and its large size makes it easy to see and target against the wall. Weights are usually in the 4–14 kg range, with 9 kg (20 lb) for men and 6 kg (14 lb) for women being the classic CrossFit standards, and a 6 kg often used in Hyrox-style formats.

What a wall ball is used for

• Wall ball shots — the signature squat-to-throw-and-catch movement, the reason the ball exists.
• Thrusters and squat-to-press variations — using the ball as a comfortable, forgiving load.
• Partner throws and group conditioning — the soft shell makes high-volume catching safe.
• Loaded carries, squats and core work — the ball doubles as a soft, huggable load.

The wall ball's soft, oversized design is perfect for its job and poor for others: it's too soft and bulky for a crisp chest pass, and it must not be slammed into the floor (the soft shell isn't built for it). But for CrossFit boxes, Hyrox facilities and group-conditioning floors, the wall ball is indispensable — you'll want several, in a couple of weights. See ATE's CrossFit equipment range.

What is a slam ball?

The slam ball is the toughest and densest of the three, and its defining feature is what it doesn't do: bounce. A slam ball is built to be hoisted overhead and driven into the floor at maximum force, over and over, and to land with a dead thud and stay put — no rebound. That "dead" quality is a deliberate engineering choice: a bouncy ball slammed at full force would rocket back up into your face, so the slam ball is filled to kill the bounce entirely.

Construction reflects the abuse it takes. A slam ball has a thick, tough shell — heavy-duty rubber or PVC — over a dense filling (often sand or a similar dead-weight material), and it's small and compact for its weight (roughly 23–30 cm) so it's easy to grip and control through violent, explosive movements. Slam balls come in a very wide weight range, from around 2 kg up to 25 kg or more, because slamming a light ball fast and slamming a heavy ball hard are both valid training stimuli. The surface is usually textured for grip, since sweaty hands and overhead throws demand security.

What a slam ball is used for

• Ball slams — the signature overhead-to-floor slam, a superb full-body power and conditioning movement.
• Rotational slams — side and diagonal slams for rotational power and core.
• Loaded carries, cleans and throws — the compact, tough shell handles dynamic ground-based work.
• HIIT and conditioning circuits — slams are a favourite finisher because they're intense, simple and safe to do to failure.

The slam ball's no-bounce toughness makes it the only safe choice for floor slams and the best tool for explosive, ground-based conditioning. It's too small and hard for wall-ball catches and not designed for the same rebound throws as a medicine ball. For CrossFit, HIIT and conditioning, though, it's a must — and it's part of ATE's functional and CrossFit equipment range.

Construction: why they're built so differently

The clearest way to understand these three balls is through how they're built, because the construction is engineered around the job. Get this and you'll never confuse them again.

The medicine ball: firm shell, dense core, moderate rebound

A medicine ball is built to hold its shape and rebound predictably. The shell — rubber, vinyl, leather or synthetic — is firm, and the core is dense and relatively rigid. This gives it the moderate bounce that makes rebound throws and partner work possible, and the solid feel that suits holding, pressing and rotational movements. The trade-off is that it's not soft enough for comfortable high-volume catching and not dead enough for full-force slams.

The wall ball: oversized, soft, shock-absorbing

A wall ball is built to be caught, repeatedly, without punishing the hands — so it's the opposite of firm. The shell is a thick, soft, padded synthetic cover, and the filling is soft and shock-absorbing, giving the ball its large, forgiving, slightly squishy character. That softness cushions every catch, protects a training partner if it drops, and lets the ball deform slightly and grip the wall on impact. The trade-offs: it's bulky, it can't be slammed on the floor, and it's not crisp for passing.

The slam ball: thick shell, dead filling, no air

A slam ball is built to be destroyed — slammed at full force, thousands of times — and to not bounce. The shell is thick, tough rubber or heavy-duty PVC, and the filling is a dense, dead material (commonly sand or iron shot in a gel/rubber matrix) with essentially no air, which kills the rebound entirely. It's compact and heavy for its size, textured for grip, and reinforced at the seams because the slam is the most violent thing you can do to a ball. The trade-off: it's hard and small, so it's wrong for wall-ball catches and heavy partner catches.

Bounce: the single deciding factor

If construction is the cause, bounce is the effect that most clearly separates the three — and it's the property that makes each safe or dangerous for its job. Understanding bounce prevents the most common and most hazardous mistakes.

• Slam ball — no bounce (dead). This is non-negotiable and safety-critical. A slam ball must not rebound, because you slam it overhead into the floor at full force; a bouncy ball would ricochet straight back at your head. The dead landing is exactly what lets you slam to failure safely.
• Wall ball — low, soft bounce. A wall ball has minimal, soft rebound. It's thrown at a wall (not slammed at the floor) and caught, so it needs to come off the wall gently and land softly if missed — not spring around the room.
• Medicine ball — moderate, predictable bounce. A medicine ball rebounds usefully off a solid wall or the floor, which is what enables rebound throws, partner catches and some dynamic drills. It's the most "ball-like" of the three in its bounce.

This is why you can't casually swap them: slam a bouncy medicine ball and it flies back at you; try wall-ball shots with a hard medicine ball and you'll wreck your hands and risk a facial injury on a missed catch; throw a soft wall ball for a rebound drill and it just flops. Match the bounce to the movement.

Size and weight compared

Size and weight differ in ways that matter for how each ball is handled, and they're often the quickest visual tell.

Diameter and feel in the hands

The wall ball is the biggest — deliberately oversized (~35–36 cm) and bulky so it's easy to catch, hug and target on a wall, even though it may weigh the same as a much smaller ball. The slam ball is the smallest and densest (~23–30 cm) so you can grip it securely and control it through violent overhead movements. The medicine ball sits in between, compact enough to throw and pass crisply. If you line up a 9 kg wall ball, a 9 kg medicine ball and a 9 kg slam ball, the wall ball dwarfs the other two — same weight, very different size, because each size serves its movement.

Weight ranges

Weight ranges overlap but skew differently:

• Medicine balls: commonly 1–12 kg. Lighter options suit rehab and high-velocity throws; heavier ones suit loaded core work.
• Wall balls: commonly 4–14 kg, with 9 kg (men) and 6 kg (women) the classic CrossFit standards; 6 kg is common in Hyrox-style work.
• Slam balls: the widest range, from ~2 kg up to 25 kg or more, because both light-and-fast and heavy-and-hard slams are useful.

For a gym, the practical implication is that you'll stock wall balls in a couple of standard weights (6 and 9 kg), medicine balls in a small spread for versatility, and slam balls across a broader range so members can choose light-fast or heavy-hard.

Best exercises for each ball

Here's what each ball is genuinely best at — the movements that justify owning it.

Medicine ball exercises

• Rotational wall throws — explosive oblique and rotational power for athletes.
• Chest pass & overhead throw — upper-body power, solo against a rebound wall or with a partner.
• Weighted sit-ups, Russian twists, V-ups — loaded core work.
• Squats, lunges and carries — the ball as a compact load.
• Rehab drills — controlled, low-impact loading and coordination work.

Wall ball exercises

• Wall ball shots — the squat-to-throw-and-catch; the definitive CrossFit and Hyrox conditioning movement.
• Thrusters & squat-to-press — using the soft ball as a forgiving load.
• Partner wall/soft throws — safe high-volume catching for groups.
• Weighted squats, lunges & core holds — a soft, huggable load.

Slam ball exercises

• Overhead ball slams — the signature full-body power and conditioning movement.
• Rotational & side slams — rotational power and core.
• Ball cleans, throws & loaded carries — ground-based dynamic work.
• HIIT finishers — slam intervals to failure, safely.

Notice how little overlap there is at the specialist end: wall-ball shots need a wall ball, floor slams need a slam ball, and crisp rotational throws are best with a medicine ball. That's the whole argument for owning the right tool.

Which ball should you buy? By goal

Here's the direct recommendation for each type of trainee and facility.

For CrossFit

You need at least a wall ball (for wall-ball shots) and a slam ball (for slams) — both are staples of CrossFit programming. A medicine ball is a useful addition for accessory and rotational work but is lower priority than the other two. A box should stock multiple wall balls in 6 and 9 kg and a range of slam balls. Everything's in ATE's CrossFit equipment range.

For Hyrox

The wall ball is essential — the wall-ball shot is a Hyrox station, typically with a 6 kg ball — so train specifically with it. Slam balls and medicine balls support general conditioning around it. See the Hyrox equipment range.

For athletic / rotational power

A medicine ball is your primary tool — rotational and explosive throws are the best way to build sport-specific power for cricket, tennis, golf, boxing and throwing events. Add a slam ball for vertical power.

For conditioning & HIIT

A slam ball is the MVP — slams are simple, intense, safe to do to failure, and need no wall or partner. A wall ball adds squat-based conditioning if you have a wall.

For a home gym

If you can only buy one, a slam ball is the most versatile and space-efficient for a home setup: you can slam, carry, clean, throw and load core work with it, and it needs no wall and won't bounce around a small space. Add a wall ball if you have a suitable wall and do CrossFit/Hyrox work, and a medicine ball for rotational and rehab work.

For rehab & general fitness

A light medicine ball is ideal — controlled, low-impact, versatile for core, coordination and return-to-sport work. See ATE's exercise balls and best sellers.

Can one ball replace another?

The honest answer: partially, and only at the general end — never for the specialist movements. Here's exactly where you can and can't substitute.

Can a medicine ball replace a slam ball?

For light slams, sometimes — but be careful. A firm medicine ball that isn't rated for slamming will bounce back at you and can split at the seams under repeated full-force slams. Some heavier, firmer medicine balls tolerate occasional light slams, but for genuine, repeated, full-force floor slams you need a purpose-built no-bounce slam ball. Don't slam a bouncy ball.

Can a medicine ball replace a wall ball?

Not well. A medicine ball is smaller, harder and firmer, so high-rep wall-ball shots will punish your hands and a missed catch is far more likely to hurt. It'll work for a few reps in a pinch, but for real wall-ball training the soft, oversized wall ball is the correct tool.

Can a slam ball replace a wall ball (or vice versa)?

No, in both directions. A slam ball is too small, hard and dense to catch repeatedly overhead — wall-ball shots with a slam ball would be brutal and unsafe. And a wall ball must never be slammed into the floor — its soft shell isn't built for it and will fail. These two are the least interchangeable of all.

The takeaway: a medicine ball is the most versatile stand-in for general throwing and core work, but the wall ball and slam ball are specialists you can't fake. If you do CrossFit or Hyrox, you genuinely need the specific tools; if you only do general fitness or rotational work, a medicine ball alone may be enough.

How to choose the right weight

Weight selection differs by ball because the movements differ. Here's how to pick.

Choosing a wall ball weight

Follow the movement standard. For CrossFit, the classic standards are 9 kg (20 lb) for men and 6 kg (14 lb) for women, thrown to a 10-ft (men) or 9-ft (women) target. For Hyrox-style work, 6 kg is common. Beginners should start lighter (4–6 kg) to groove the squat-throw-catch rhythm before progressing. Because wall-ball shots are high-rep and technical, err on the side of a weight you can cycle for 15–20 unbroken reps with good form.

Choosing a slam ball weight

Slam balls reward variety. A lighter slam ball (4–8 kg) lets you move fast and explosively for power and conditioning; a heavier slam ball (10–20 kg+) builds strength and grinding full-body power. Most trainees benefit from having access to a light and a heavier option. For pure conditioning intervals, a weight you can slam explosively for 20–30 seconds without slowing is ideal; for strength-power, go heavier for lower reps.

Choosing a medicine ball weight

For explosive throws, lighter is usually better — a ball light enough to throw fast (often 2–6 kg) builds more power than a heavy ball thrown slowly, because power is force times velocity. For loaded core and holding work, go heavier (6–10 kg). Rehab and beginners should start light (1–4 kg). Because the medicine ball is so versatile, a small spread of two or three weights covers most needs.

What makes a quality ball (and how cheap ones fail)

All three balls take punishment, and the difference between a quality ball and a cheap one shows up fast. Here's what to look for — and how the cheap ones fail.

For wall balls

Look at the stitching and seams — double- or reinforced-stitched panels survive repeated catching and the occasional floor contact, while cheap glued or single-stitched shells split. Check the shell material (a tough but soft synthetic that resists abrasion) and that the ball holds its shape and weight over time rather than going lumpy or shifting filling to one side. A quality wall ball keeps a consistent, catchable shape for years; a cheap one deforms, sheds its cover and develops a heavy side.

For slam balls

The shell thickness and seam reinforcement are everything, because slamming is the most violent thing you can do to a ball. A quality slam ball uses thick, tough rubber/PVC with reinforced seams and a dead filling that won't shift or leak; cheap ones split at the seam or start leaking sand after a few hard sessions. Grip texture matters too — a smooth slam ball becomes dangerous with sweaty hands. Look for a genuinely no-bounce ball; if it rebounds at all, it's not a real slam ball.

For medicine balls

Check the shell durability and grip, the consistency of the bounce, and how well it holds its shape. A quality medicine ball rebounds predictably and keeps its firmness; a cheap one goes soft, loses its bounce, or cracks. For any of the three, buying from a genuine manufacturer that controls materials and construction — rather than a reseller shipping the cheapest available ball — is the difference between kit that lasts years and kit you replace every season. ATE builds its functional balls to commercial-gym durability; explore the CrossFit and exercise ball ranges.

Care & durability: making your balls last

A little care keeps all three performing:

• Slam on the right surface. Slam balls belong on rubber gym flooring or a platform, not on rough concrete or tile, which chews up the shell. Wall balls should hit a solid, smooth wall — not a rough brick surface that shreds the cover.
• Wipe them down. Sweat and grime degrade grip and shell over time; a regular wipe keeps them clean and safe to handle.
• Store them properly. Keep balls on a rack or in a bin, out of prolonged direct sun and heat, which ages rubber and synthetic covers. A dedicated ball rack keeps a gym tidy and the balls in good shape.
• Inspect seams. Check slam-ball and wall-ball seams periodically; catching a small split early prevents a blowout mid-workout.
• Use each for its job. The single biggest cause of premature failure is misuse — slamming a wall ball, or doing wall-ball catches with a hard medicine ball. Match the ball to the movement and they'll last for years.

Kitting out a gym: how many of each ball?

For a commercial box, studio or functional floor, plan your ball inventory the way you plan any high-use station — by peak demand, not by one of each. A practical starting framework:

• Wall balls — the highest-demand ball in a CrossFit or Hyrox setting, because wall-ball shots appear constantly in class programming and everyone needs one at once. Stock several in 6 kg and 9 kg (enough for a full class to work simultaneously), plus a few lighter 4 kg for beginners.
• Slam balls — stock a range of weights (say 4, 6, 8, 10, 15 kg) with duplicates of the popular mid-weights, so members can pick light-fast or heavy-hard. Slams are a favourite finisher, so demand spikes at the end of sessions.
• Medicine balls — a small spread (2–10 kg) covers rotational, core and rehab work; you generally need fewer of these than wall or slam balls.
• Storage — add a ball rack or bin so the balls stay organised, off the floor and easy to grab; a tidy ball station is a mark of a well-run gym.

Because all three are relatively affordable per unit but high-use, they're a high-value part of a functional fit-out — and buying commercial-grade versions that survive daily abuse is far cheaper over time than replacing cheap ones every few months. ATE supplies all three to commercial standard as part of its CrossFit and Hyrox ranges, and can help spec quantities for a full box or facility.

Common mistakes people make

• Slamming a bouncy ball. The most dangerous mistake — a medicine ball or any bouncy ball slammed at full force rebounds into your face. Only slam a genuine no-bounce slam ball.
• Doing wall-ball shots with a medicine ball. Too hard and small — it shreds the hands and a missed catch can injure. Use a soft wall ball.
• Slamming a wall ball. The soft shell isn't built for floor slams and will split. Wall balls go on the wall, not the floor.
• Buying by weight alone. A 9 kg wall ball, medicine ball and slam ball are three completely different tools despite the same weight — buy by type and job first.
• Going too heavy for power work. For explosive throws and slams, a ball light enough to move fast builds more power than a heavy one you move slowly.
• Buying cheap for a commercial floor. High-use functional balls take relentless abuse; a cheap ball that splits in a month costs more than a commercial one that lasts years.

Why buy your functional balls from ATE

All three balls take a beating, which is exactly where quality of construction — stitching, shell, seam reinforcement, dead filling, consistent shape — separates equipment that lasts from equipment that fails. ATE is a fourth-generation Indian manufacturer that builds functional-training equipment to commercial-gym durability and international standards, rather than reselling the cheapest available ball. That means wall balls that keep their catchable shape, slam balls with reinforced seams and a genuinely dead bounce, and medicine balls that hold their firmness — plus local warranty, support and the ability to supply a whole box or Hyrox floor to one standard. Explore the full CrossFit equipment, exercise balls and best sellers ranges to equip your space.

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A quick history: where each ball came from

The three balls arrived in fitness at very different times, which explains a lot about their design. The medicine ball is ancient in fitness terms — weighted balls for strength and rehabilitation date back well over a century, used by wrestlers, boxers and physical-culture pioneers, and later a staple of physiotherapy. That long history is why the medicine ball is the generalist: it was the original all-purpose weighted ball, and everything else specialised away from it.

The slam ball emerged as strength-and-conditioning coaches wanted a way to train explosive, full-body power that could be done to failure without the technical demands (or spinal load) of Olympic lifts — and without a ball rebounding dangerously. The no-bounce, sand-filled design solved that, and slams became a conditioning staple. The wall ball is the newest, popularised by the explosion of CrossFit: the wall-ball shot became a benchmark conditioning movement, and the sport needed a large, soft, catchable ball to perform it safely at high volume. Understanding this history makes the design differences obvious — each ball was shaped by the movement that created demand for it.

Sample workouts for each ball

To make the differences concrete, here's a simple, effective way to train with each. Warm up first, and scale weights to your level.

Slam ball conditioning finisher

A brutal, simple finisher: 5 rounds of 15 overhead slams, 10 rotational slams each side, and a 20 m loaded carry hugging the ball, resting as needed. Use a weight you can slam explosively without slowing — the goal is speed and intent on every slam.

Wall ball workout

Classic CrossFit-style: "Karen" is 150 wall-ball shots for time (9 kg to a 10-ft target for men, 6 kg to 9-ft for women) — a benchmark that will test legs and lungs like nothing else. Beginners: aim for 5 rounds of 15 wall-ball shots with a lighter ball, focusing on hitting the target and catching into the next squat.

Medicine ball power circuit

For athletic power: 4 sets of 5 explosive rotational throws each side (throw as fast as possible into a solid wall), 5 overhead throws, and 5 chest passes, with full rest between sets. Use a light-to-moderate ball so every throw is fast — this is power work, not conditioning, so quality and speed beat volume.

Notice how each workout suits the ball: high-volume conditioning for the wall ball, explosive slams to failure for the slam ball, and low-rep, high-speed power throws for the medicine ball. That's the three tools doing what they're built for.

Frequently asked questions

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Ready to equip your functional floor? Explore ATE's CrossFit equipment, Hyrox equipment and exercise balls, or see the best sellers to plan a full fit-out with the right ball for every movement.

About ATE. Anand Track & Field Equipment Pvt. Ltd. (ATE) is a fourth-generation Indian manufacturer of competition-grade gym, Hyrox and athletics equipment, building in its own factory to international standards. This guide reflects general training and equipment knowledge as of July 2026.

This guide is general information, not medical or coaching advice. Weights, sizes and standards vary by manufacturer and format — confirm the specification of any specific ball before buying, and consult a qualified coach when learning explosive movements like slams and wall-ball shots.