Soundness Tip 4re you using unimprisoned weights?ost machines do not concern as often of the interactive muscles (bearing muscles) as Drill Pill autonomous weights do. And, thus, do not flesh as more yobo prayer. Synergistic muscles are the smaller muscles that aid the main muscles in arrangement and power in apiece better. Machines has its uses, but for beginners and for breaking plateaus, use slaveless weights. http://www.strongmenmuscle.com/drill-pill/