hello i am studing a new work out and their is a refrence to ,20 mountain climbers can any body tell me what thay are 

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they are a great circuit training type exercise.  you start off in the press up position, then bring one leg in, knee bent, and then alternate legs in and out as fast as you can.  Hard work!

thank you and your right wicked work out

exercises like that are really under-rated, though they do seem to be coming back into fashion again right now.

There's a real fashion for these type of exercises as fat burners, isn't there?