What is Isometric? :-Isometric contraction = when a muscle is contracted & held under tension without moving (no lengthening or shortening). Example: • Holding the dumbbell halfway in a biceps curl. • Pausing at the bottom of a squat. • Flexing quads in a vacuum pose. What is Eccentric? The eccentric phase of an exercise = the lowering / lengthening part of the movement, where the muscle resists force while getting longer. Example: • In a biceps curl → lowering the dumbbell. • In a squat → going