A good eccentric hamstrings exercise I use is where you kneel down with your body in the upright position and only your knees bent to 90deg.

Have someone hold your ankles or fix them to/under something very heavy.

Then concentrate on "falling forwards" from the **knees**, not the hips or L/S. You go down as far as you can control then come back up again. Usually only a very small number of reps and sets to start off with!

I am useless at doing this exercise but I have seen people able to go fully prone and then back up again! Amazing hamstring strength.

Be warned - your patients will cramp up. Don't forget to warn them and teach them how to de-activate their hams and stretch them properly!!!!

Enjoy - I will be cramping along with anyone who is willing to try!

BTW, i forget what these exercises are called but I think they have a name...