The One Workout Mistake Most Guys Make in Their 30s and Pay For in Their 40s, According to a Veteran Trainer

Though you may have noticed some new aches and odd sensations in your late 20s, your 30s are when years of life’s wear-and-tear really start to catch up. And though you may still feel physically strong enough to lift the familiar heavy weights of your youth, there are now other factors to consider: recovery, stress, sleep, and overall load of life. By their 30s, many men begin making the mistake of doing too much, too soon.

"Your 30s are not about ego lifting," says Kris Herbert, founder, trainer, and creator of The Gym Venice.