Anybody done the highs and lows?

[marshmallow man]

I'm just finishing up the first week of this. It is grueling. I honestly thought the first part of the week was going to be the harder of the two. I was wrong. The second half of the work is much more difficult.

I was pumping thru leg extensions today and my legs were on fire!

http://findarticles.com/p/articles/mi_m0801/is_5_70/ai_n31586815/