I started running in March and controlled my diet. Now I have lost nearly ten pounds.
Control your diet by either skipping meals or eating less. Probably breakfast is rich, I am full at 7 noon, and dinner is rare, usually a fruit afternoon tea, followed by some vegetables and a little rice.
Diet is really important, otherwise exercise is useless.
If parents pay attention to diet, it may be that the increase of muscle mass after pro-exercise leads to weight change.
In fact, two days and eight days are normal fluctuations, and many reasons are easy to solve. It may be because of drinking too much water, or it may be affected by today's physical condition. Don't worry too much, it will be healthy soon. Come on ~