The warm-up mistake that was quietly capping my client's strength gains

A client asked why her squat had stalled for six weeks despite doing everything right. The program was fine. The warm-up was the problem, and it took me embarrassingly long to see it.

She was warming up with static stretching — holding a hamstring stretch, holding a hip flexor stretch — right before loading the bar. Static stretching held for more than about 20 seconds temporarily reduces the muscle's ability to produce force. She was, without knowing it, switching off her own strength minutes before asking for a personal record.

The fix was swapping static holds for movement-based warm-ups: bodyweight squats, leg swings, walking lunges — the same joints, moving, not held still. Nothing exotic. Her squat moved 15 pounds in two sessions.

Static stretching is not the enemy. It is just scheduled wrong. It belongs after training, or on its own recovery day, not as the last thing you do before asking a muscle to produce a maximum effort. The warm-up should wake a muscle up, not tell it to relax.