In practice. Exercise without oxygen equipment, the load of renting books is deeply exciting, and running for five minutes is enough. You have to fuck yourself to death on barbells and dumbbells. First, gradually develop large muscle groups, often using overload, exhaustion, peak contraction and half-way sprint, taking turns bombing, paying attention to protection, muscle tearing and scratching is very troublesome.
It is estimated that it is very important for you to practice your shoulders, but if your muscles are weak and it is difficult to practice your shoulders, it is suggested that you first use large muscle groups such as back and chest, then use the auxiliary muscles of the second and third heads, and then focus on practicing your shoulders, oblique and triangular.