For explosiveness - Jumping squats
For endurance - Lunges with back foot on balance board
Generally, take any leg excercise you normally do and add an unstable surface and you will hit a much wider range of leg muscles.
When exercising your calves, you really have to thrash them because they are such a dense,strong muscle.
Last edited by jimmybonzai; 03-23-2009 at 12:20 PM.