Legal, Maybe Not Provable. Entering into an oral contract is one thing, but proving that the contract exists, or that specific terms of the contract exist, is entirely different. Oral contracts are legally dangerous, because there is no concrete record of their existence.
The classic ballet move, the pirouette, is a complete 360-degree turn performed on one leg. In a ballet, it is usually done more than one time, in a twirling motion. Leg muscles used in a pirouette are the calves, hamstrings and quadriceps.
Skating is a unique sport because it works out an array of muscles in your lower body at the same time. It also works some muscles in the upper body as well. The primary muscles involved in roller skating are the hip abductors, the quadriceps, hamstrings, shins, and calf muscles. Secondary muscles worked are the erector spinae in the back, abdominals and obliques.