Exercise and pain: the neurobiology, measurement, and laboratory study of pain in relation to exercise in humans.

Department of Excercise Science, University of Georgia, Athens, USA.
Exercise and Sport Sciences Reviews (Impact Factor: 4.82). 02/1999; 27:119-66.
Source: PubMed
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    Frontiers in Physiology 01/2013; 4:104. DOI:10.3389/fphys.2013.00104 · 3.50 Impact Factor
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    ABSTRACT: We have recently demonstrated that electromyogram (EMG) amplitude of the frowning muscles correlates with perception of effort during leg-extension exercise. However, during aerobic exercise the relationship between facial EMG and perception of effort has never been investigated. The aim of the present study was to investigate whether facial EMG reflects perception of effort also during constant-workload cycling. We investigated the effects of exercise duration and exercise intensity on facial EMG of the corrugator supercilii muscles, rating of perceived effort, heart rate, and blood lactate concentration. Twenty recreationally active male and female volunteers performed a constant-workload time to exhaustion test on a cycle ergometer. Participants were randomly allocated to the heavy-intensity [63 ± 3% peak power output (P(peak))], or the severe-intensity (80 ± 5% P(peak)) group. The results show that facial EMG can differentiate between two exercise intensities during constant-workload cycling. The effects of exercise duration are inconclusive. Facial EMG increased over time in the severe-intensity group, but not in the heavy-intensity group. Future studies testing a wider range of exercise intensities are required to establish a correlation between facial EMG and exercise intensity during aerobic exercise, and further investigations are needed to establish why there is a discrepancy between facial EMG and perception of effort during lower-intensity aerobic exercise.
    Arbeitsphysiologie 08/2011; 112(5):1967-72. DOI:10.1007/s00421-011-2138-2 · 2.30 Impact Factor
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    ABSTRACT: Background: Animal models comparing rat behaviours are often used in studies characterizing addiction and stress. Aim of this study was evaluation of five or ten days forced treadmill exercise effect on morphine addiction-induced hypoalgesia in young male rats. Materials and Methods: In this study we used twenty four male Wistar rats weighing 200-300 g. Addicted and non-addicted rats have run as forced exercise on motorized treadmill one hour daily for ten days. Tail-flick latency was tested for each rat three times daily with 10 min intervals at a day before, 5 and 10 days after running on treadmill. A sham group consisted of animals placed on treadmill while its motor was off but electrical shock turned on. Mean of tail-flick latencies was analyzed statistically in sham, ran addicted and non-addicted rats. Results: The tail-flick latencies were no significant alteration between all groups during 24 hours before forced running (1080 m distances daily). Animals ran 5400 m and 10800 m during 5 and 10 days on treadmill, respectively. Tail- flick latencies showed that pain reflex latency was increased significantly (p
    Journal of Clinical and Diagnostic Research 12/2007; 1(6):555 - 560. · 0.13 Impact Factor