Tighten your core, exhale, and straighten at the elbows pressing your body away from your arms. Upper arms don’t move and elbows continue to point forward away from your body throughout the exercise. Maintain a straight body position during the exercise keeping your head and spine neutral. Avoid sagging or arching your low back/hips. Inhale and with control, slowly lower your body to start position. This counts as one rep. Repeat.