Not suitable for strength training at night. 1, the air quality will decrease at night, which has certain side effects on human training. If you are a friend who has been engaged in fitness training for a long time, the relative impact of side effects is smaller than that. It is suggested that 4: 00 pm to 6: 00 pm is the best. 2. Strength training at night will affect sleep. It is only suitable to do some relaxing fitness activities at night to relax and help sleep. Push-ups and sit-ups are recommended. But you don't need to do too much, just one or two groups, 20 to 30 in each group) 3. Training at night. The human body is in the stage of rest and detoxification. If you do strength or intensity training, it will disrupt your original body circulation.