Muscle tension in human operant heart rate conditioning.
D003216:Conditioning, Operant; D004576:Electromyography; D006339:Heart Rate; D006801:Humans; D008297:Male; D009119:Muscle Contraction; D009129:Muscle Tonus; D009132:Muscles / Q000502:physiology; D012054:Reinforcement, Psychology; D012119:Respiration; D013909:Thorax / Q000502:physiology