The short answer is yes. The condition known as “overtraining” can happen when your workout regime doesn’t include the necessary rest days or the right nutrition. Lack of rest for your body to recover can lead to an even more serious condition known as “overtraining syndrome (OTS),” which is very difficult to overcome. If you find yourself “hitting a wall” with your normal fitness routine or stop seeing benefits from exercising, you might be overtraining. There are a few things you can do to prevent overtraining. First, gradually increase the intensity of your endurance and strength workouts, especially when beginning. Another important thing to remember is to incorporate rest days or active rest days into your weekly exercise. Rest days don’t necessarily mean you have to be sedentary, but reduce your usual workout to a yoga session, light swim, or bike ride.