How Iridium Programs This

This variation places significantly higher demand on the anterior deltoids and core stabilizers than standard floor pressing. Iridium evaluates your fatigue scores for these specific secondary muscle groups and may substitute a stable exercise if your recent training load indicates you cannot maintain control. For progression, Iridium tracks your RPE to ensure stability challenges do not prevent you from reaching an effective stimulus for the chest.

Form Cues

Place hands on the sides of the ball directly under your shoulders
Brace your core and squeeze your glutes to lock your hips in place
Lower your chest slowly until it nearly touches the ball
Press through your palms to return to the start position
Keep your elbows tucked at a 45-degree angle to your body

Don't

Don't let your hips sag or your lower back arch
Don't allow your elbows to flare out wide perpendicular to your body
Don't rush the movement or bounce off the ball
Don't let your head drop forward; keep the neck neutral

Common Mistakes

Placing hands too high on top of the ball
Sagging at the hips due to lack of core tension
Flaring elbows too wide
Performing half-reps instead of full range of motion
Looking up or tucking the chin excessively

Muscles Worked

This exercise primarily targets the pectoralis major (middle chest) while engaging the anterior deltoids and triceps for pushing power. The unstable surface forces the rotator cuff and core stabilizers—specifically the rectus abdominis and obliques—to work significantly harder than in a standard push-up to maintain balance and alignment.