Is Training on Back-to-Back Days Bad? What Science Really Says About Lifting Two Days in a Row Personal Note: As a Powerlifter and lifting heavy I DO NOT recommend this. Breaking down the muscle everyday can result in injury. As a Runner or Gymnast or Boxer this is the true way to train. I have done this workout. 5 Days a week training same body parts. I used heavy weight. The only conclusion I have is that I got much weaker and put far more stain on my joints. Light lifting or bands would be a different story as it becomes more of a TONING, AEROBIC workout! December 3, 2025 One of the most common questions coaches hear is: “Is it bad to train on back-to-back days?” Lifters often worry about overtraining, not recovering enough, or hurting their gains by working the same muscle groups too soon. Many believe you  must  rest 24, 48, or even 72 hours between workouts for proper muscle recovery. But current research in exercise science tells a very different story. Is It Bad to Tra...