Muscles involved: pectorals, triceps, deltoids
Form: lie supine on bench, head, neck and spine in a neutral position, start position is holding the barbell over the chest with the elbows flexed to 90˚. Inhale, then exhale as you push the barbell straight up, straightening the arms.
Cautions: keep core tight, wrists straight, barbell centred over the chest. This can be done with light DBs, feet may be put up on bench if the client has lower back problems.
Trainer techniques: cue breathing, braced core, watch for proper position of the arms/elbows, BB centred. Spot with hands on the barbell.