MEN’S HEALTH MYTH BUSTER: Do Squats Kill Your Knees?
Cotton swabs are dangerous when you push them too far into your ears. It’s a matter of knowing what you’re doing.
A recent study in Medicine & Science in Sports & Exercise found that “open-chain” exercises—those in which a single joint is activated, such as the leg extension—are potentially more dangerous than closed-chain moves—those that engage multiple joints, such as the squat and the leg press.
The study found that leg extensions activate your quadriceps muscles slightly independently of each other, and just a 5-millisecond difference in activation causes uneven compression between the patella (kneecap) and thighbone, says Anki Stensdotter, the lead study author.
“The knee joint is controlled by the quadriceps and the hamstrings. Balanced muscle activity keeps the patella in place and appears to be more easily attained in closed-chain exercises,” says Stensdotter.
To squat safely, hold your back as upright as possible and lower your body until your thighs are parallel to the floor (or at least as far as you can go without discomfort in your knees).
Try front squats if you find yourself leaning forward. Although it’s a more advanced move, the weight rests on the fronts of your shoulders, helping to keep your back upright.