Exercises

Straight-leg side plank

Hold a straight side-on body line supported on the forearm and feet to train lateral trunk stability.

Forearm side plank with straight stacked legs, elbow below the shoulder and lifted aligned hips.

No equipment · Mat

Source: NASM · Side Plank

Step by step

  1. Lie on your side with both legs straight, feet stacked or slightly staggered and the lower elbow under your shoulder.
  2. Brace your torso and lift the pelvis until the shoulders, hips and ankles form one line.
  3. Hold while breathing steadily; keep the hips stacked without sagging or turning.
  4. Lower the pelvis with control and repeat on the other side.

Common mistakes

  • Letting the hips sag or rotate.
  • Placing the elbow away from the shoulder or holding the breath.

Anatomy and technique: the references below. Region boundaries and movement diagrams are schematic. Exercise images are AI-generated illustrations.