Sorry but that's just nonsense. Gaining muscle is beneficial at any age and can lead to better quality of life and longer longevity. Gaining a lot of muscle an

Sorry but that's just nonsense. Gaining muscle is beneficial at any age and can lead to better quality of life and longer longevity. Gaining a lot of muscle and putting a lot of effort into gaining the muscle (bulking + workout) is where the troubles maybe appear. Also, the metabolism of a 20yo is a completely different story frok the metabolism of a 40yo. So to sum up: working out and staying in shape == good. Don't worry about gaining muscle. That's just nonsense