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Record 1 of 2335
Leg intramuscular pressures during locomotion in humans
Author and Affiliation:
Ballard, R. E.(NASA Ames Research Center, Moffett Field, CA United States)
Watenpaugh, D. E.
Breit, G. A.
Murthy, G.
Holley, D. C.
Hargens, A. R.
Abstract: To assess the usefulness of intramuscular pressure (IMP) measurement for studying muscle function during gait, IMP was recorded in the soleus and tibialis anterior muscles of 10 volunteers during treadmill walking and running by using transducer-tipped catheters. Soleus IMP exhibited single peaks during late-stance phase of walking [181 +/- 69 (SE) mmHg] and running (269 +/- 95 mmHg). Tibialis anterior IMP showed a biphasic response, with the largest peak (90 +/- 15 mmHg during walking and 151 +/- 25 mmHg during running) occurring shortly after heel strike. IMP magnitude increased with gait speed in both muscles. Linear regression of soleus IMP against ankle joint torque obtained by a dynamometer produced linear relationships (n = 2, r = 0.97 for both). Application of these relationships to IMP data yielded estimated peak soleus moment contributions of 0.95-1.65 N . m/kg during walking, and 1.43-2.70 N . m/kg during running. Phasic elevations of IMP during exercise are probably generated by local muscle tissue deformations due to muscle force development. Thus profiles of IMP provide a direct, reproducible index of muscle function during locomotion in humans.
Publication Date: Jun 01, 1998
Document ID:
20040172670
(Acquired Dec 09, 2004)
Subject Category: LIFE SCIENCES (GENERAL)
Document Type: Journal Article
Publication Information: Journal of applied physiology (Bethesda, Md. : 1985) (ISSN 8750-7587); Volume 84; 6; 1976-81
Publisher Information: United States
Description: In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: LEG (ANATOMY); LOCOMOTION; SKELETAL MUSCLE; ADULTS; CALIBRATING; MUSCULAR FUNCTION; RUNNING; TENDONS; TRANSDUCERS; WALKING
Other Descriptors: LEG/PHYSIOLOGY; LOCOMOTION/PHYSIOLOGY; MUSCLE, SKELETAL/PHYSIOLOGY; ADULT; CALIBRATION; HUMAN; MIDDLE AGED; MUSCLE CONTRACTION/PHYSIOLOGY; PRESSURE; RUNNING/PHYSIOLOGY; SUPPORT, U.S. GOV'T, NON-P.H.S; TENDONS/PHYSIOLOGY; TRANSDUCERS; WALKING/PHYSIOLOGY; NASA CENTER ARC; NASA DISCIPLINE CARDIOPULMONARY; CLINICAL TRIAL
Availability Source: Other Sources
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