Soviet research found that strength gains were minimal, power increased moderately, and speed of muscular relaxation increased significantly with advancement in athletes.

“Soviet scientists research and Gina they OBS they measured a number of athletes in 20 different sports athletes of different levels so they evaluated various quality one was absolute strength and other was rate of force development pretty much power and the third was is the rate of muscular relaxation so how quickly the muscle can relax after contraction which is very very important and they have found that uh strength grew just very little from the intermediate level to the advanced level there's not a lot of improvement power increased a little bit more but the speed of relaxation is just just shut up as the athlete be became more advanced”