Not counting the aerobic warm-up time, it is acceptable to maintain the strength training time between 1 ~ 1.5 hours. Taking 8~ 12RM as an example, it is not too much to rest between groups for 60~90 seconds and last for 1.5 hours. If you exceed this range, you must consider losing weight, otherwise it will cause muscle loss, and the external performance is a rapid, sustained and substantial decline in weight.
Secondly, discuss your own reasons.
If you still feel uncomfortable within a reasonable range of exercise, you need to consider increasing muscle endurance training. In daily training, aerobic training can be added to enhance cardiopulmonary function, training above 15RM can be added to enhance muscle endurance, and more compound movements can be done.
Finally, emphasize recovery and rest.
Aerobic warm-up, massage, adequate rest and sleep after fitness are indispensable. Nutrition intake is the most important, so you need to pay attention to recovery and rest.