Isometric Contraction

Publication Title: 
Human Movement Science

This study aimed to continue our characterization of finger strength and multi-finger interactions across the lifespan to include those in their 60s and older. Building on our previous study of children, we examined young and elderly adults during isometric finger flexion and extension tasks. Sixteen young and 16 elderly, gender-matched participants produced maximum force using either a single finger or all four fingers in flexion and extension.

Author(s): 
Oliveira, Marcio A.
Hsu, Jeffrey
Park, Jaebum
Clark, Jane E.
Shim, Jae Kun
Publication Title: 
Scandinavian Journal of Medicine & Science in Sports

This consensus statement summarizes key contemporary research themes relevant to understanding the psychology and socioculture of sport injury. Special consideration is given toward high-intensity sport in which elite athlete training and performance efforts are characterized by explosive physical speed and strength, mental fortitude to push physical limits, and maximum effort and commitment to highly challenging goals associated with achieving exceptional performance.

Author(s): 
Wiese-Bjornstal, D. M.
Publication Title: 
Journal of the American Dietetic Association

Applied kinesiology is a technique used to assess nutritional status on the basis of the response of muscles to mechanical stress. In this study, 11 subjects were evaluated independently by three experienced applied kinesiologists for four nutrients (thiamin, zinc, vitamin A, and ascorbic acid). The results obtained by those applied kinesiologists were compared with (a) one another, (b) standard laboratory tests for nutrient status, and (c) computerized isometric muscle testing.

Author(s): 
Kenney, J. J.
Clemens, R.
Forsythe, K. D.
Publication Title: 
Clinical Science (London, England: 1979)

1. To investigate the stimulus to the cardiovascular and respiratory systems during isometric exercise, two patients with sensory neuropathies affecting forearm afferent nerves were studied and their circulatory and respiratory responses compared with those of normal subjects. The contribution of pain to the cardiorespiratory changes was also investigated in normal subjects by using hypnosis to relieve pain during and after isometric exercise. 2.

Author(s): 
Duncan, G.
Johnson, R. H.
Lambie, D. G.
Publication Title: 
Ceskoslovenská Psychiatrie
Author(s): 
Dan?k, V.
Smahel, M.
Pávek, V.
Publication Title: 
British Heart Journal

Skeletal muscle function was measured as force production and fatigue in both the quadriceps (a large locomotive muscle) and adductor pollicis (a small intrinsic hand muscle) in five healthy volunteers, five patients with mild chronic heart failure, and five patients with severe chronic heart failure. The quadriceps of patients with chronic heart failure had a reduced muscle cross sectional area, a reduced maximum isometric force production, and an increased tendency to fatigue.

Author(s): 
Buller, N. P.
Jones, D.
Poole-Wilson, P. A.
Publication Title: 
The Journal of Veterinary Medical Science / the Japanese Society of Veterinary Science

Concern has been growing about the cardiac toxicity of antimalarial drugs. Artemisinin, a unique type of antimalarial drug originating from a Chinese medicinal plant, has minimal adverse effects, but it has been reported to inhibit delayed rectifier potassium current, a voltage-gated potassium current. However, no studies have been published concerning the effect of artemisinin on ligand-gated potassium currents.

Author(s): 
Hara, Yukio
Yamawaki, Hideyuki
Shimada, Masami
Okada, Kiyohiro
Tanai, Toshiki
Ichikawa, Daiki
Miyake, Kimihito
Kizaki, Keiichiro
Publication Title: 
Journal of Strength and Conditioning Research / National Strength & Conditioning Association

There has been relatively little longitudinal controlled investigation of the effects of yoga on general physical fitness, despite the widespread participation in this form of exercise. The purpose of this exploratory study was to examine the effect of short-term Bikram yoga training on general physical fitness. Young healthy adults were randomized to yoga training (N = 10, 29 ± 6 years, 24 sessions in 8 weeks) or a control group (N = 11, 26 ± 7 years). Each yoga training session consisted of 90-minute standardized supervised postures performed in a heated and humidified studio.

Author(s): 
Tracy, Brian L.
Hart, Cady E. F.
Publication Title: 
The Journal of Orthopaedic and Sports Physical Therapy

STUDY DESIGN: Repeated-measures design comparing 7 static weight-bearing shoulder exercises. OBJECTIVE: The purpose of this study was to determine the demand on shoulder musculature during weight-bearing exercises and the relationship between increasing weight-bearing posture and shoulder muscle activation. BACKGROUND: Weight-bearing shoulder exercises are commonly prescribed in the rehabilitation of shoulder injuries. Limited information is available as to the demands placed on shoulder musculature while these exercises are performed.

Author(s): 
Uhl, Tim L.
Carver, Thomas J.
Mattacola, Carl G.
Mair, Scott D.
Nitz, Arthur J.
Publication Title: 
The Journal of Orthopaedic and Sports Physical Therapy

STUDY DESIGN: Repeated-measures design comparing 7 static weight-bearing shoulder exercises. OBJECTIVE: The purpose of this study was to determine the demand on shoulder musculature during weight-bearing exercises and the relationship between increasing weight-bearing posture and shoulder muscle activation. BACKGROUND: Weight-bearing shoulder exercises are commonly prescribed in the rehabilitation of shoulder injuries. Limited information is available as to the demands placed on shoulder musculature while these exercises are performed.

Author(s): 
Uhl, Tim L.
Carver, Thomas J.
Mattacola, Carl G.
Mair, Scott D.
Nitz, Arthur J.

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