If young guys stick to the same exercises every time they work out for about two months, they get stronger in a specific leg test than if they keep switching up their routine.

If overweight guys in their mid-30s do a short but intense weight training routine three times a week for six weeks, they can boost their leg strength by nearly 27%—showing you don’t need long workouts to get stronger fast.

If new guys do leg exercises with slow reps (6 seconds) instead of faster ones (2 seconds), they might get stronger in a specific knee position—even if they do the same number of sets and their muscles grow the same amount.

Doing gentle strength exercises slowly and steadily twice a week for 12 weeks makes older adults' leg muscles stronger.

When untrained men get stronger in a static leg press, the main reason is that their thigh muscle near the hip gets bigger and its fibers angle more, which helps push harder.

Doing slow, low-effort weight training three times a week for 12 weeks can make your thigh muscles bigger and stronger, just as much as doing fast, high-effort weight training.