Treadmill, used for brisk walking or jogging, will burn fat only if you keep exercising for more than half an hour, preferably after one hour.

Spinning is led by the coach, and there are relaxation exercises after the end.

The spacewalk and climbing machine you mentioned are more suitable for girls, that is, the exercise time is kept for half an hour. If you are just starting to exercise, you should start from less to more and take your time.

There are also some instrumental sports, which are generally unisex. Do them well, in groups of ten and in groups of three.

And relax your legs every time you get off the treadmill, such as leg press, shaking your legs and patting your legs.

Don't worry that relaxing exercise won't harden your legs or form muscles.