50 secs.
10 secs both feet on ground
Then one leg up hold for 10 secs
Then put that leg down and hold position for 10 secs with both feet on ground.
Then raise the other leg up hold for 10 secs.
Then put that leg down and hold position again for 10 secs
30 secs rest then repeat.
I do them as part of my pre-run strength excersises.
I really should do the side plank as well but I find it almost impossible at the moment to raise my left leg in that position. My left side is by far my weakest.
Edited: 21/08/2012 at 21:46