In my personal experience, it is because in the first week, you didn't do much exercise before, so the effect of exercise on muscle exercise and calorie consumption will be more obvious, and slowly, after your exercise comes up, the same amount of exercise will not burden your body or muscles, so the corresponding effect will be less obvious. This contrast is actually obvious, just like you just started running, you may not be able to run a kilometer. But stick to it every day, and 1000 meters will become completely fine, and then I may run for 3 kilometers or 5 kilometers without breathing. I think this is the reason. In fact, exercise to lose weight needs to be lasting and the effect is the best, which is not necessarily obvious. If you persist, it will be useful. If you think the effect is not obvious now, you should give up all your efforts. Come on! Wish you success!