Tough

deadlymosquito

Crossfithe is so tough and fun. I enjoy the variety of exercises every time I come in

shadowfax_c11

It is important to fine something you really love doing. It helps you keep going on those really tough days, when you are tired or sore and would rather just stay home and watch TV with a giant tub of ice cream.

AllanMisner

There is a group specifically for cross fitters - http://community.myfitnesspal.com/en/group/99-crossfit-love.

And yes, it is a very challenging program or part of a program.