Muscle recruitment patterns regulate physiological responses during exercise of the same intensity

1  Department of Kinesiology, The College of William & Mary, Williamsburg, Virginia 23187 - 8795; and 2  the Human Performance Laboratory, Ball State University, Muncie, Indiana 47306 On different days, 10 men performed 30-min sessions of cycling at 50-55% of their peak oxygen uptake ( O 2 ); on...

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Bibliographic Details
Published in:American journal of physiology. Regulatory, integrative and comparative physiology integrative and comparative physiology, 2000-12, Vol.279 (6), p.2229-R2236
Main Authors: Deschenes, Michael R, Kraemer, William J, McCoy, Raymond W, Volek, Jeff S, Turner, Benjamin M, Weinlein, John C
Format: Article
Language:English
Subjects:
Adult
Bicycling
Blood Glucose - metabolism
Blood Pressure
Body Temperature
Electromyography
Exercise - physiology
Exercise Test
Heart Rate
Homeostasis - physiology
Humans
Hydrocortisone - blood
Insulin - blood
Lactates - blood
Male
Muscle, Skeletal - physiology
Oxygen Consumption
Time Factors
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Summary:1  Department of Kinesiology, The College of William & Mary, Williamsburg, Virginia 23187 - 8795; and 2  the Human Performance Laboratory, Ball State University, Muncie, Indiana 47306 On different days, 10 men performed 30-min sessions of cycling at 50-55% of their peak oxygen uptake ( O 2 ); one at 40 rpm and another at 80 rpm. Rectal temperature, heart rate (HR), mean arterial pressure (MAP), plasma lactate, glucose, insulin, and cortisol were measured before exercise, during the 15th and 30th min of exercise, and at 5 and 10 min postexercise. Rating of perceived exertion (RPE) was assessed 15 and 30 min into exercise. Electromyography established cadence-specific different intensities of quadriceps activation during cycling. At minute 30  of exercise and 5 min postexercise, HR was significantly ( P  
ISSN:0363-6119
1522-1490
DOI:10.1152/ajpregu.2000.279.6.r2229