Single worst exercise?

[shouldbworking]

After reading this article I thought I'd bring the discussion here.

http://www.nytimes.com/2011/04/17/magazine/mag-17e...

In my view it's super-burpees. From a standing position, drop down to your knees, legs out behind you, pushup, legs back in, star jump from the squatted position, repeat.

Also interesting are its notes on hiit

[shouldbworking]

996 sps said:

swerni said:

leg extensions.

Ask any competent physio and they will say avoid like the plague

Yep they do as they are an open chain exercise and expose the ligaments to shear forces, again if the ligaments attached have no form of graded strains/ruptures the you could argue that if quads and hamstrings are strong enough then carry on. Not always a heavy weight though but sports specific a kicking sport has to expose knee exten to a form of open chain exercise.

Can someone explain this one a little more to me? these form a part of our karate warm up routines (1 set of 20 reps) and I'd like to understand the risk a little more.

Thanks