Modifications of microvascular filtration capacity in human limbs by training and electrical stimulation

Acta Physiologica Scandinavica
M D BrownJ Gamble

Abstract

This study investigated whether an increase in microvascular surface area as a result of endurance training, which increases human skeletal muscle capillarity, would translate to greater capacity for fluid filtration compared with strength training, which does not affect capillary supply. Values for filtration capacity, Kf, derived from the slope of calf volume change, Jv, measured by venous occlusion plethysmography, against cuff pressure during a protocol of small cumulative pressure steps, were significantly higher in endurance athletes (5.78 +/- 0.88 mL min(-1) 100 mL(-1) mmHg(-1) x 10(-3), P < 0.05) than controls (3.38 +/- 0.32 mL min(-1) 100 mL(-1) mmHg(-1) x 10(-3) whereas strength-trained athletes had values similar to control (4.08 +/- 0.56 mL min(-1) 100 mL(-1) mmHg(-1) x 10(-3), ns), suggesting that surface area is important. However, when sedentary subjects underwent either a 4-week unilateral dynamic plantarflexion training programme (70% peak power, 20 min day(-1), 5 days week(-1) or a calf muscle electrical stimulation programme (8 Hz, 3 x 20 min day(-1), 5 days week(-1), neither of which caused limb blood flow to alter after training nor would be expected to increase capillarity, only the stimulation group showe...Continue Reading

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Citations

Aug 28, 2012·European Journal of Applied Physiology·Stephen D PattersonRichard A Ferguson
Sep 25, 2010·Lymphatic Research and Biology·Sebastian GehlertWilhelm Bloch
Apr 17, 2009·Applied Physiology, Nutrition, and Metabolism = Physiologie Appliquée, Nutrition Et Métabolisme·Marie-Eve RiouDenis R Joanisse
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May 25, 2013·Journal of Applied Physiology·Julie E A HuntRichard A Ferguson

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