Wall Balls: Technique, HYROX Standards and How to Train Them

Nobody looks forward to wall balls. They arrive last in a HYROX race, when your legs are already ruined, and they ask you to squat and throw 100 times while your heart rate sits somewhere near its ceiling. The movement itself is simple, which is the trap: a wall ball is a front squat and a push press stitched together, and small technical errors that cost you nothing on rep 5 will end your set somewhere in the forties.

This guide covers the standards, the technique that survives fatigue, and how to build up to a hundred of them without hating your life.

The HYROX standards

The final station of every HYROX race is 100 wall balls, and the singles rulebook sets the numbers:

• Women: 4kg ball to a 2.70m target
• Women Pro: 6kg ball to a 2.70m target
• Men: 6kg ball to a 3.00m target
• Men Pro: 9kg ball to a 3.00m target

Two things get a rep waved off. Not hitting the centre of your target, and not reaching depth, which the rulebook defines as knees bent past 90 degrees. Since 2025 the penalties are time-based rather than the old distance penalties, so a judge's call now costs you seconds on the clock. Standards change between seasons; read the current rulebook rather than assuming last year's applies.

How to do a wall ball

Stand close enough to the wall that your fingertips brush it with your arms extended. Too far back and every throw becomes a forward lob you then have to chase.

1. Hold the ball high. Hands underneath and slightly to the sides, ball resting against your chest and chin, elbows tucked in rather than flared. The ball should sit in your hands, not be squeezed by them.
2. Squat to depth. Sit down between your heels with your chest tall, hips below the knee crease. Depth is not optional and it is not a favour to the judge: a full squat lets your legs generate the power. Squatting through a fuller range also transfers better to strength and jumping performance than partial reps, according to a scoping review of deep squatting.
3. Drive and throw as one movement. Stand up hard and let the momentum from your hips carry the ball upward, adding the arms only at the very top. If your shoulders are doing most of the work, your legs are not finishing.
4. Aim at the top of the target. Send the ball to the centre of the target, breathing out sharply as it leaves your hands.
5. Catch soft and go straight back down. Receive the ball with slightly bent arms, absorb it into your chest, and use the downward weight to start the next squat. That absorption is free energy and it is what separates a smooth set from a stop-start grind.

Muscles worked and why it hurts so much

Your quads and glutes do the heavy lifting on the squat, the calves and hamstrings assist in the drive, and the delts and triceps finish the throw. Meanwhile your upper back, abs and lower back are working continuously to keep the ball supported and your torso upright.

The reason wall balls feel worse than the sum of those parts is the cardiovascular demand. You are moving large muscle groups through a full range while holding a load in front of your chest, which restricts breathing, and the arms go overhead repeatedly, which raises heart rate faster than almost any other loaded movement. That combination is exactly why the NHS counts this sort of work as vigorous intensity, and why a set of wall balls covers a meaningful chunk of the 150 minutes of moderate or 75 minutes of vigorous activity recommended each week.

Common mistakes

Standing too far from the wall. Every rep drifts forward, you chase the ball, and by rep 30 you are two feet out of position and throwing at an angle.

Cutting depth. It feels faster and it is slower, because shallow squats put the whole job on your shoulders. Judges also catch it, which is worse.

Flared elbows on the catch. Wide elbows mean the ball lands on your arms rather than being supported by your frame, your shoulders fatigue early, and the next throw starts from a weaker position.

Holding your breath. People instinctively brace and hold at the bottom. Breathe out on the throw, in on the catch, every rep, and you will get much further into a set.

Going unbroken from rep one. The most common pacing error. Sets of 20 with a five-second reset are faster over 100 reps than one heroic run that dies at 43.

How to train for 100 reps

Build the squat first. A wall ball is a squat you happen to be throwing something during, so front squats and goblet squats at moderate weight develop the position that makes the throw efficient. Add push presses for the overhead drive.

Then train the movement itself in three ways across a fortnight:

• Volume work. 5 sets of 20 with 60 seconds rest. Boring, and the single most useful session for a race.
• Pace work. 10 sets of 10 on the minute. Teaches you what a sustainable rhythm feels like when you are already breathing hard.
• Broken sets under fatigue. 100 reps for time after a 1km run, broken however you like. This is the rehearsal; do it fortnightly at most, because it takes a few days out of your legs.

Kit is simple. You need a proper wall ball, which is soft-shelled and designed to be caught, rather than a slam ball, which is dense, unforgiving and meant to be thrown down. Our best medicine ball guide covers what to look for, and the slam ball guide explains why the two are not interchangeable. If you are training HYROX at home, a plyo box and a decent skipping rope cover most of the rest of the conditioning work.

Recommended reads

1. Front squat technique
2. Goblet squat: how to do it
3. The best medicine ball in the UK
4. The best slam ball in the UK
5. Workout and exercise guides