Close-grip Push-up

Start in a high plank position with your hands placed close together, directly under your shoulders.

Engage your core and lower your body towards the ground, keeping your elbows close to your sides.

Push through your palms to extend your arms and return to the starting position.

Repeat for the desired number of repetitions.

Losing tension in the core or lower back partway through the movement — because Close-grip Push-up loads multiple joints at once, a small breakdown in bracing at the hips or spine compounds through the whole chain.

Flaring the elbows too wide or letting the hips sag/pike, which shifts load off Triceps and stresses the shoulder joint.

Rushing through reps using momentum rather than controlling both the lifting and lowering phase, which is especially important since there's no external load to force good tempo.

Progressing the load or reps too quickly before technique is consistent across every rep of every set.