Use small dumbbells or barbells for multiple trainings. Or make targeted small amounts and multiple contacts with certain muscle groups. A large number of muscle exercises only increase the cross-sectional area of muscles, which is simply large. The muscle strength and toughness of repeated exercises with a small amount of exercise are similar to the differences between foreign Hercules and Bruce Lee. One is big and stupid, and the other is small and sharp. Of course, if your muscles are weak because you have never exercised, there is nothing to say. No matter what exercise it is, let's talk about it first.