The article provides a complete overview for fitness routines. Explain the second principle of training, and the balance one needs to find WILL MARK BRAINLIEST

The principle of progression talks about the requirement to increment or increase gradually the difficulty of workload. This way of workout will increase the physical strength and body stamina. If a person wants to develop more power on his legs, the frequency, time, difficulty or intensity of workout should be lengthen or increased because this will progress the muscle.