Hello, the best way to thin the muscles on your thighs is to exercise, such as riding a bike, which means you can thin your legs or thin belly. Doing push-ups and hula hoops can effectively reduce the weight on your stomach. There is also running, which can regulate the whole body and is also a good way to lose weight. Take 50 deep breaths before going to bed. When walking, consciously tuck in your abdomen, hold your head high, and your abdomen will be firm. Doing jumping exercises often before going to bed helps to grow taller.

I hope I can help you, thank you!