If you just want to lose weight, you can do aerobic exercise, but you must stick to it for more than 30 minutes.

Good aerobic exercise: jogging and brisk walking (keep the heart rate around 140). If you can swim, you can lose weight and keep fit.

In response to your request: "It doesn't matter whether a person can do it or not, don't be bored, make friends and spend some money", I think riding a horse can best meet your request.

Riding a horse with a lot of exercise is good for the waist, abdomen and lower limbs.

There are many horse farms in Shanghai. Just search online. Usually once 150 yuan, about two hours.

But I suggest you don't go to Huayang Racecourse. The conditions are very poor.