Prolonged activity of lumbar erectores spinae. An electromyographic and dynamometric study of the effect of training.
D000293:Adolescent; D000328:Adult; D004576:Electromyography; D006225:Hand / Q000502:physiology; D006801:Humans; D008161:Lumbosacral Region; D008297:Male; D009119:Muscle Contraction; D009132:Muscles / Q000502:physiology*; D010806:Physical Education and Training; D005082:Physical Exertion; D011187:Posture; D013997:Time Factors