Muscles that get effected mainly for me is my my calf muscles. I feel like they are under stress and tension all the time, guess it doesn’t help being on my feet most days. My right dominant leg can feel a little tension from time to time but mainly my left i feel it most especially in my calf, gets easily fatigued and exhausted, where i need to rest it. When i stand on my tip toes at times my left leg shakes that much because my left calf is so tired. Maybe more my left because my right is more dominant and stronger because it is slightly bigger than my left.