Sinner - Tennis No. 1

Story: During the time of my studies /1970-76/ I was involved in an alpine skiing school for the very young children, ages 5-8 - University of Ljubljana / Slovenia.My programme included both snow and dry training. I put special emphasis on coordinated pole work, because the pole punch sets the key impulse for the turn with the skis against a fixed obstacle - the peg - and the dynamics of rhythm are also taken into account. The learning process requires individually selected special auxiliary exercises, which the children are happy to perform. Among the children in my group was Mateja Svet, 5 years old at the time, grew up to be a great champion in alpine skiing. When Mateja was winning the biggest competitions, a person who knew my work during Mateja's childhood, would tell me every time she won that I had laid the foundation for her success, through my forcing of the "L/R" - left/right - coordination of movement.
That was in the previous millennium, and I am still researching L/R.Why mention my story from the previous millennium?
Jannik Sinner: current No. 1 in Tennis
Not only Sinner's current tennis victories, but also his childhood skiing victories have attracted attention. He too, in his early childhood, emphatically practised the coordinated movement from the left turn to the right /psoas + synergists muscle group/. A tennis ball is a projectile that, according to the rules of the game, hits the court. The impact swing of the racket, when the muscles work in a ballistic contraction mode, requires a precise positioning of the complete body for the ball to hit the court. And the psoas muscles coordinately regulate this placement at the instinctive level, so the operative trajectory of the psoas muscles must be optimal. In Sinner, this operative traectoria of the psoas muscle anatomy is still emphasised to this day, and the ball hits the tennis court.