Side Plank

Primary target: External Oblique (腹外斜肌)

Exercise Details

Equipment: Bodyweight
Sets & Reps: 3 sets × 30-45 s per side
How to do it: Elbow under the shoulder; lift the hips into one straight line; top arm on the hip or reaching up; breathe evenly.
Common mistakes: Hips dropping, body rotating forward, shrugging