Martial arts training itself is a great workout. If you combine martial arts training and gym, you run the risk of overtraining. It also affects flexibility. Many martial artists do martial arts and gym. The best examples of martial artist actors who do martial arts and go to the gym are Jean Claude Van Damme, Scott Adkins and Tiger Shroff. Their mobility has not been affected. Each of them can do a complete split or stretch. More over Tiger Shroff can do flips. It is important to balance training and nutrition. You can do martial arts and go to the gym. Why do you want to do martial arts and go to the gym? Is it for bodybuilding, strength development or just to stay in shape. If you want to stay physically fit and have a good physique, martial arts training is sufficient. Martial arts training is also sufficient for weight loss or fat loss.
As for developing strength, it depends on the type of martial art you practice. If you are doing striking martial arts like karate, boxing, muay thai, mixed martial arts (MMA), then you do not need to go to the gym to develop strength. Training for striking martial arts develops strength and involves exercises that develop strength. If you are doing grappling martial arts such as Judo and Jujitsu, then you need to go to the gym to develop strength. As for bodybuilding, there is no martial art that builds muscle as easily as a gym. Building muscle in a gym is much faster than in martial arts. You may be wondering if martial arts builds muscle. Yes, it does. It is building muscle with your own body weight. It’s your choice whether you go to the gym for bodybuilding or work out with your own body weight. You will need to go to the gym if you want to see results fast. You will need a trainer who knows both and can guide you to your goal. If you are working out on your own, there is some risk involved.