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Edited by David H. Perrin

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David H. Perrin

This paper reviews the concepts associated with isokinetic open chain assessment and exercise of the quadriceps and hamstring muscle groups. Following a review of the isokinetic concept of exercise, the paper addresses principles of assessment and exercise of the knee, including the importance of musculoskeletal and cardiovascular screening, warm-up, body position, stabilization, and joint alignment. Gravity correction, test and exercise velocity, and duration of exercise are also addressed. Interpretation of an isokinetic evaluation of the knee is also addressed within the context of force-velocity relationships, peak torque relative to body weight, and bilateral and reciprocal muscle group relationships. Joint range of motion and test velocity are also discussed with respect to patellofemoral and tibiofemoral joint forces. Finally, recommended protocols for isokinetic assessment and exercise of the quadriceps and hamstring muscle groups are presented.

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David H. Perrin

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David H. Perrin

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David H. Perrin

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David H. Perrin

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David H. Perrin

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David H. Perrin

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Scott C. Haynes and David H. Perrin

This investigation examined the effect of a counterirritant on delayed onset muscle soreness (DOMS). Fourteen female subjects had DOMS induced in the elbow flexor muscles of the nondominant arm through repeated eccentric contractions. Subjects returned 48 hrs after exercise and were randomly assigned to either a counterirritant ointment (CO) or placebo ointment (PO) treatment group. They were asked to quantify the amount of pain they experienced using a graphic pain rating scale while attempting to extend their elbow. Eight ml of the counterirritant or placebo ointment was applied to the anterior aspect of the arm centered directly over the biceps brachii. Pain and range of motion measurements were taken both pretreatment and 15 minutes posttreatment. Analysis of variance revealed that the CO group experienced significant pain relief and increased range of motion while the placebo group showed no significant changes. These findings suggest that counterirritants may be an effective means of treating the pain and restricted range of motion associated with delayed onset muscle soreness.

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Barton P. Buxton and David H. Perrin

The purpose of this investigation was to determine the relationship between personality characteristics, as measured by the Myers-Briggs Type Indicator (MBTI) (form G), and an acute pain response in 107 postadolescent men. Subjects included 107 military school cadets. Each subject performed a cold pressor test (CPT) and was evaluated for pain threshold and pain tolerance times. Each was then evaluated for preference on eight personality characteristics: extraversion, introversion, sensing, intuition, thinking, feeling, judging, and perception. The personality characteristics were measured by the MBT1 (form G). Pearson product-moment correlations between the pain threshold and tolerance times and the eight personality characteristic scores were nonsignificant. The results indicated there was no relationship between the eight personality characteristics, as measured by the MBTI (form G), and pain threshold or pain tolerance, as measured by the CPT, The findings also indicated a low correlation between pain threshold and pain tolerance (r=.25).