Nostradamus
Bionic Poster
https://www.youtube.com/watch?v=TOe7JSBQRD0
http://www.optimumtennis.net/tennis-serve-exercises.htm
Tennis Serve Exercises #6: Lower Body Training
For the hips and legs, basic strength is built up by doing squats, calf raises and knee extensions. Basic squats can be alternated with machine leg presses, split squats and lunges. 3 sets of 12-15 reps are usually performed.
but those leg presses are actually hurting my back
http://www.optimumtennis.net/tennis-serve-exercises.htm
Tennis Serve Exercises #6: Lower Body Training
For the hips and legs, basic strength is built up by doing squats, calf raises and knee extensions. Basic squats can be alternated with machine leg presses, split squats and lunges. 3 sets of 12-15 reps are usually performed.
but those leg presses are actually hurting my back