Jerrold Sott Petrofsky

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Six subjects between the ages of 18 and 35 years old were examined to compare muscle use. The rectus abdominus, erector spinal, gluteus maximus, quadriceps, hamstring, gastrocnemius, and tibiallis anterior muscles were assessed by electromyogram. Conventional exercise was performed by weight lifting on quadriceps, hamstring, abdominal and back extension(More)
Six subjects between the ages of 18 and 30 years old were examined to compare use of the quadriceps, hamstring, gluteus maximus, hip abductor, hip adductor, abdominal, gastrocnemius and paraspinal muscles as assessed by electromyogram (EMG). Muscle use was measured during all forms of exercise and exercise using conventional weight lifting equipment was(More)
BACKGROUND Historically, electrical stimulation (ES) has been used as a treatment for wound care. However, some studies show wounds healing with ES, whereas others do not. Part of the difficulty can be resolved by using heat to help dilate blood vessels, but an inherent problem with ES is uneven currents across the wound due to the use of only two(More)
For more than 2,000 years, local tissue heating has been used to treat rheumatism, arthritis, muscle strains and sprains, and a variety of other afflictions. Heat can be applied with hot packs, ultrasound, diathermy, microwave, lasers, or a whirlpool bath. The overall effect is the same. Heat is applied to the surface of the skin in an effort to transfer(More)
BACKGROUND Decrease in skin blood flow (BF) due to diabetes may be one reason why only 31% of neuropathic diabetic ulcers heal in 20-weeks. Recent evidence shows that skin blood flow may be increased if therapy is done in a warm room. The purpose of this investigation was to compare healing rates and skin blood flow of chronic stage III and IV wounds in(More)
Fifty-six subjects were studied in a single blinded randomized study to assess the impact of a 10-day weight-loss program with low-impact aerobics on weight, girth, and muscular strength. Exercises were performed for appropriately 60 minutes a day, and upper and lower body girth, strength changes of the quadriceps, hamstrings, and gluteus maximus muscles(More)
BACKGROUND The reaction of vascular endothelial cells to occlusion and heat in Southeast Asian Indians (SAI) compared to Caucasians (C) has not been studied, although genetic differences are found in endothelial cells between the races. MATERIAL/METHODS Ten C and Ten SAI (<35 years old) male and female subjects participated. There was no difference in the(More)
A technique is described for measuring regional blood flows in the brain of the cat. The measuring system is based on the principle of photoelectric plethysmography, a method commonly used to measure skdn blood flow. To miniaturize the photoelectric flow probe to a size compatible with cerebral insertion, a light emitting diode (LED) was used as the light(More)
Four subjects, whose ages averaged 24.3 years, were examined to assess the isometric component of dynamic exercise during the following 4 conditions: treadmill running, cycle ergometry, aerobic exercise following a video, and during hip extension exercise (lunges). The isometric component of exercise was characterized by examining heart rate (HR) and blood(More)
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