I suggest you learn Taekwondo (it may be hard to lose weight, but you can also practice it with some physical exercises) or women's fighting (it takes a lot of effort to gain weight ~ ~), yoga (you can lose weight and keep fit) and Brazilian Jiu Jitsu. This effect is the best. Usually we can sweat a lot when we practice prone fighting together for a few minutes. If possible, it may take 2 or 3 months to take effect.