These biceps curls on the total gym are a great way to isolate the biceps and eliminate any cheating by rocking your torso like a fish out of water like some people do.  Some bodybuilders claim that hanging upside down before an upper body set or performing exercises upside down allow more blood to flow into the muscles. They claim a bigger pump = bigger muscles. Whether they have any scientific basis behind what they are saying is debatable but there is no debate that these biceps curls on the total gym give you a great pump in your biceps. Remember to get full biceps work do not flex your wrists and fully supinate your arms. Personal Trainer Michael Behnken, MS, NASM-CPT-PES, CSCS