You’re getting injured
Those aching knees, hinky shoulder, and pain in your lower back are sending you a clear message: Doing the same workout too frequently can lead to overuse injury, according to Mayo Clinic. You’re likely pushing your body too hard and/or not giving it enough time to recover, which can strain the muscles and joints. Mix up your workouts to avoid stressing the same body parts every day. Don’t see rest days as being lazy, but as giving your body the chance to replenish and rebuild itself. Read more about how to avoid sports-related injuries.
Your performance is down
It can be hard to tell how much exercise is too much, but one of major sign is a decrease in performance, whether you’re running more slowly, finding your usual weights harder to lift, or you have less stamina in general than normal. Without adequate time for your body to recover, hormone levels change, which can cause a breakdown of muscle. “This can lead to deterioration of muscle function, declines in physical performance, and even increased risk of injuries,” says personal trainer Jessica Matthews, MS. (Does it matter if you do weights or cardio first? Our experts have the answer.)