I've heard that glycerine pumps are actually extracellular, and while they may be aesthetically pleasing they are not good for what most would want a pump for....
Both visual aspect and increasing intracellular hydration and in turn intracellular nutrient uptake.
For the case you mentioned above, a show, its perfect.
Very interesting excerpt found from my research, which is also encouraging and very sensible in its description of the method of action at work:I'm doing more research on this now that you bring it into question, but whole body hydration is far from disadvantageous when trying to increase endurance, time to fatigue, and muscle fullness/working capacity; even if it isn't 100% intracellular specific.
"A muscle pump occurs when fluid fills up the muscle cells. When you work out, your muscles create metabolic waste products that draw water into the cells. Since glycerol also attracts water, having more glycerol inside your muscle cells will enhance the pump you can achieve. It also pulls more water into your blood vessels, causing them to dilate and increasing their vascularity.
Researchers from the University of Glasgow (Scotland) found in a Z007 study that subjects who took both creatine and glycerol for seven days had nearly 40% more body fluid than a group that took just creatine, and almost 50% more fluid than a group taking just glycerol. This has important implications for hypertrophy: Muscle cell swelling stretches the muscle membrane and instigates processes that lead to long-term growth.
For better muscle pumps, take 10-30 grams of glycerol with 20-32 ounces of water about one hour before workouts. Also be sure to take creatine with your pre- and postworkout shakes for a synergistic effect."
BY JIM STOPPANI, PHD
Edit: After re-reading my own entry above, it just donned on me that this is from FLEX about four issues ago, I was so impressed by the write up offered by Dr. S, I once again implemented Glycerine into my regimen. In all honesty, is has been SO successful for me in my lifting and competing, I almost feel guilty sharing the 'secret' weapon; but we're all trying to achieve the same end result here, so enjoy!