You can do several groups of cycling in bed at night. Ps: I push 100 every time. Repeat it five times and you will sweat all over. You can also increase it from 50 to 50 according to your own situation. After a month, you will see that the key to the effect is persistence.

If you want to do sports, you can learn to do aerobics. Personally, it should be effective to move the whole body.