Abstract
| Originalsprog | Engelsk |
|---|---|
| Tidsskrift | Journal of Applied Physiology |
| Vol/bind | 107 |
| Udgave nummer | 5 |
| Sider (fra-til) | 1413-9 |
| Antal sider | 6 |
| ISSN | 8750-7587 |
| DOI | |
| Status | Udgivet - 2009 |
Bibliografisk note
Keywords: Adult; Chronic Disease; Exercise Therapy; Exercise Tolerance; Female; Humans; Muscle Contraction; Muscle Strength; Muscle, Skeletal; Myofascial Pain Syndromes; Physical Exertion; Stress, Mechanical; Treatment OutcomeAdgang til dokumentet
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I: Journal of Applied Physiology, Bind 107, Nr. 5, 2009, s. 1413-9.
Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › peer review
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TY - JOUR
T1 - Effect of contrasting physical exercise interventions on rapid force capacity of chronically painful muscles
AU - Andersen, Lars L
AU - Andersen, Jesper L
AU - Suetta, Charlotte
AU - Kjaer, Michael
AU - Søgaard, Karen
AU - Sjøgaard, Gisela
N1 - Keywords: Adult; Chronic Disease; Exercise Therapy; Exercise Tolerance; Female; Humans; Muscle Contraction; Muscle Strength; Muscle, Skeletal; Myofascial Pain Syndromes; Physical Exertion; Stress, Mechanical; Treatment Outcome
PY - 2009
Y1 - 2009
N2 - Rapid force capacity of chronically painful muscles is inhibited markedly more than maximal force capacity and is therefore relevant to assess in rehabilitation settings. Our objective was to investigate the effect of two contrasting types of physical exercise on rapid force capacity, as well as neural and muscular adaptations in women with chronic neck muscle pain. A group of employed women (n = 42) with a clinical diagnosis of trapezius myalgia participated in a 10-wk randomized controlled trial; specific strength training of the neck/shoulder muscles, general fitness training performed as leg-bicycling; or a reference intervention without physical activity. Maximal voluntary shoulder abductions were performed at static angles of 35 degrees and 115 degrees with simultaneous recording of electromyography (EMG) in the trapezius and deltoid. Maximal muscle strength and activation (peak torque and peak EMG) as well as rapid muscle strength and activation [rate of torque development (RTD) and rate of EMG rise] were subsequently determined. Trapezius muscle fiber characteristics were determined with ATPase histochemistry. Significant changes were observed only in the specific strength training group. Whereas peak torque increased 18-29% (P < 0.01), RTD increased 61-115% (P < 0.001). Peak EMG and rate of EMG rise increased correspondingly (P < 0.05-0.001), and trapezius type II muscle fibers hypertrophied 20% (P < 0.001). In conclusion, rapid force capacity of chronically painful muscles is highly responsive to rehabilitation with specific strength training. The underlying mechanisms were related to both pain reduction and general neuromuscular adaptations to strength training. Potentially, the present method can be a useful clinical screening tool of muscle function in rehabilitation settings.
AB - Rapid force capacity of chronically painful muscles is inhibited markedly more than maximal force capacity and is therefore relevant to assess in rehabilitation settings. Our objective was to investigate the effect of two contrasting types of physical exercise on rapid force capacity, as well as neural and muscular adaptations in women with chronic neck muscle pain. A group of employed women (n = 42) with a clinical diagnosis of trapezius myalgia participated in a 10-wk randomized controlled trial; specific strength training of the neck/shoulder muscles, general fitness training performed as leg-bicycling; or a reference intervention without physical activity. Maximal voluntary shoulder abductions were performed at static angles of 35 degrees and 115 degrees with simultaneous recording of electromyography (EMG) in the trapezius and deltoid. Maximal muscle strength and activation (peak torque and peak EMG) as well as rapid muscle strength and activation [rate of torque development (RTD) and rate of EMG rise] were subsequently determined. Trapezius muscle fiber characteristics were determined with ATPase histochemistry. Significant changes were observed only in the specific strength training group. Whereas peak torque increased 18-29% (P < 0.01), RTD increased 61-115% (P < 0.001). Peak EMG and rate of EMG rise increased correspondingly (P < 0.05-0.001), and trapezius type II muscle fibers hypertrophied 20% (P < 0.001). In conclusion, rapid force capacity of chronically painful muscles is highly responsive to rehabilitation with specific strength training. The underlying mechanisms were related to both pain reduction and general neuromuscular adaptations to strength training. Potentially, the present method can be a useful clinical screening tool of muscle function in rehabilitation settings.
U2 - 10.1152/japplphysiol.00555.2009
DO - 10.1152/japplphysiol.00555.2009
M3 - Journal article
C2 - 19762523
SN - 8750-7587
VL - 107
SP - 1413
EP - 1419
JO - Journal of Applied Physiology
JF - Journal of Applied Physiology
IS - 5
ER -