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

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

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.

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 older people who didn’t get stronger from doing just one set of leg exercises start doing four sets instead, they’ll likely see bigger thigh muscles after 10 weeks of training twice a week.

If young, healthy guys do strength training for 12 weeks using different types of muscle contractions—whether slow or fast—they’ll get significantly stronger in their thigh muscles, no matter which style they pick.