Strength myths, checked
What people believe about lifting, why it sounds right, and what the studies found.
No Lifting weights will make you bulky
No. Muscle grows slowly, and on the same program women grow it by the same share as men from a smaller start. Most people get stronger and firmer long before bigger.
No You have to train to failure to grow
No. In 15 studies, stopping a couple of reps short built the same strength and size, and the 2026 ACSM review found failure made no consistent difference.
No Sore muscles mean the workout worked
No. Week-one soreness is repair work. In a 10-week study, muscle building only tracked growth once the soreness had faded, and soreness drops fast as you keep training.
Not the way you think Squats are bad for your knees
Deep squats with learned form load the knee less than people fear. Heavy half squats and big jumps in weight cause more trouble, a review of 164 articles found.
No It's too late to start lifting at 70
No. Nursing home residents aged about 90 nearly tripled their leg strength in eight weeks, and at an average age of 87, strength more than doubled in ten.
No Lifting weights stunts a kid's growth
No. The American Academy of Pediatrics supports supervised strength training for kids and teens. The risks come from poor form, too much weight and no coach.
Sort of The more you lift, the longer you live
Up to about two hours a week. Past 120 minutes the risk of death stopped falling in 147,374 US adults, and a review of 16 studies found it lowest near 40 minutes.
Not the way you think Train your grip and you'll live longer
Grip predicts survival because it reflects strength and health across the whole body. Nobody has shown a hand gripper adds a day. Train the whole body and grip follows.
Sort of Cardio kills your strength gains
Across 43 studies, adding cardio didn't dent max strength or muscle size. Only explosive power dipped a little, mostly when both were done in the same session.
