Originally Posted by supermark21
free weights use the stabilization muscles alot more in an effort to balance the weight. machines are a more direct lift in that you just push or pull because the weight is already set up and a predetermined range of motion. rich probably doesnt use free weights too often in his pre fight training because its an hour straight and he doesnt go extremely heavy
Yeah rich isn't trying to improve his max strength, he's after muscle endurance (lactic acid threshold) which is better suited towards machine work since your working to failure and don't want to risk an injury right before a fight.