Im getting ready to join a MMA gym and I want a head start on conditioning to be ahead of the game. I want to do 5 5min circuits performing every exercise for 1 minute each. I have a tractor tire, sledge hammer, sand bag i built, an some olympic weights. My question though, should i do each round devoted to muscle groups or do each round with mixed exercises hitting every muscle group per round? So this: R1-back and bis R2- legs R3- chest and tris R4- rotation power exercises R5- shoulders or each round focus on a little bit of everything?