AskTheTrainer.com Personal Trainer Michael Behnken, MS, NASM-CPT-PES, CSCS 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 ...