Mon 29 Mar 2010
W.O.W. 3/28/10- Keeping Cool, Staying Young
Posted by Doug McGuff under Uncategorized
[72] Comments
I worked out Sunday morning before going into work in the ER for a 7am-3pm shift. It had been 14 days since my last workout, so I was well-recovered. I went ahead and progressed my weights as planned. I made modest improvements on all movements but the pulldown which was new in this rotation. I replaced the pullover with pulldown this week because I am having “cubital tunnel syndrome” from excess computer/mouse use at work (we recently changed from dictation to a computer-based charting system). I wanted to keep direct pressure off my ulnar nerve until this healed. My strength was good, as was my metabolic condition. What was surprising was how my tolerance for muscular pain and fatigue had dropped. Mentally, my toughness had dropped even while my performance improved.
Med X Leg Press
Med X Compound Row
Med X Chest Press
SS Pulldown
Med X Overhead Press
Thanks to Jeff Erno who found a great review of BBS at http://www.scribd.com/doc/26853526/Great-Health-News-for-Seniors
I also found a neat article on Pubmed. At Ultimate Exercise we strive to keep the training area at 61 degrees. This comes from empirical research done by Ken Hutchins back in his Nautilus days that documented that subjects showed improved performance when they were allowed to effective dissipate heat. I also remember hearing about research at DARPA with a cooling glove that allowed subjects to exercise with very little fatigue or performance drop-off. Apparently, cooling of the hands that allows bypassing the vasa vasorum (blood vessels that constrict in the fingers to prevent transmittal of cold blood to the core circulation). In extreme cold the vasa vasorum allow frostbite to develop in order to preserve core temperature (literally sacrificing limb to save life). This article suggests that this might actually work. Now NFL players will be trying to sneak these into the combine.
Palm Cooling Delays Fatigue during High Intensity Bench Press Exercise.
Kwon YS, Robergs RA, Kravitz LR, Gurney BA, Mermier CM, Schneider SM.
1Department of Health, Exercise & Sports Sciences, University of New Mexico, New Mexico, U.S.A.; 2School of Biomedical and Health Science, University of Western Sydney, Sydney, Australia. 3Department of Orthopaedics and Rehabilitation, University of New Mexico School of Medicine, New Mexico, U.S.A.
Local cooling can induce an ergogenic effect during short term intense exercise. One proposed method of personal cooling involves heat extraction from the palm. PURPOSE:: In this study we hypothesized that local palm cooling during rest intervals between progressive weight training sets will increase total repetitions and exercise volume in resistance trained subjects exercising in a thermoneutral environment. METHODS:: Sixteen male subjects (mean+/-SD, age = 26+/-6 yr, height = 178+/-7 cm, body mass = 81.5+/-11.3kg, 1RM Bench press = 123.5+/-12.6 kg, weight training experience = 10+/-6 yr) performed 4 sets of 85% 1RM bench press exercise to fatigue, with 3 min rest intervals. Exercise trials were performed in counterbalanced order on three days, separated by at least 3 days; thermoneutral (TN), palm heating (PH), and palm cooling (PC). Heating and cooling were applied by placing the hand in a device called the Rapid Thermal Exchanger, set to 45 degrees C for heating or 10 degrees C for cooling. This device heats or cools the palm while negative pressure (-35 to -45 mmHg) is applied around the hand. RESULTS:: Total exercise volume (kg) during the 4 PC sets (2480+/-636) was significantly higher than during TN (1972+/-632) and PH (2156+/-668) sets, (p <0.01). The RMS of the surface EMG with PC exercise was higher (p <0.01), esophageal temperature (p < 0.05) and RPE (p <0.05) were lower during PC compared to TN and PH. CONCLUSION:: Palm cooling from 35 to 20 degrees C temporarily overrides fatigue mechanism(s) during intense intermittent resistance exercise. The mechanism(s) for this ergogenic function remain unknown.
