You can do it in many ways. You are a second-level action in level, and the simplest is a third-level action, so you must be tired at first. It is normal to feel sore at first. Lactic acid can make some parts of the body ache, but you can stick to it and reduce the amount of exercise appropriately. If you can persist, you will get used to it in a week or so. I recommend you to do a three-level exercise, lying flat, lifting your legs, pedaling and turning your legs. Positive 20 and negative 20 are a group. After four groups, rest for two minutes, then stand upright for two minutes. Waist twisting, belly bending and hand rubbing are all good ways to rest, which can reduce your muscle aches.

I'll give you a first-class action, lying flat, hands straight, and the whole person straight. Then the body closes instantly, like closing an open book, and the hand touches the foot. This action is also called starting from both ends.

I suggest you start with simplicity, and gradually increase the amount of exercise and exercise after a week or so of adaptation.

Hope to adopt, thank you.