Whether you use perfect form or cheat a little on your reps, your muscles can grow just as much - how you lift doesn't matter as much for building muscle as people think.

The study compared people doing biceps curls and triceps pushdowns with strict form versus using extra momentum (cheating), and found both groups gained similar amounts of muscle after 8 weeks, suggesting that how perfectly you perform an exercise matters less for muscle growth than many people think.

The study compared people doing bicep curls and triceps pushdowns with perfect form versus using momentum (swinging). After 8 weeks, both groups grew muscle equally, showing that how strictly you perform exercises doesn't much matter for building muscle.