Tai Chi is the first choice. If you want to cultivate your self-cultivation, you can also practice Sanda and Taekwondo, which can not only defend yourself, but also keep fit. Of course, Tai Chi is ok, but the effect is slow. Sanda and Taekwondo come quickly, and you can see the effect soon. Pay attention to warm-up when practicing, because ligaments are easy to be injured in adulthood, but it's okay, as long as the requirements for ligaments are not high, it's good to practice. Muay Thai is so hateful that you can't stand it during training.