This situation can be practiced again. Because it is the first day of exercise, because you don't exercise for too long, your body will have an anaerobic exercise, so a metabolite called lactic acid will accumulate in your body, so you will feel sore. At this time, if you continue to exercise, you will slowly absorb and accelerate its absorption.

Suggestion: You can do this, reduce the amount appropriately the next day, and resume the original training plan after the stomach acid subsides tomorrow and the day after tomorrow. Generally speaking, if you want to exercise muscles, the amount of exercise is exquisite. Scientific exercise can get twice the result with half the effort.