CHANGE OF OPTIMUM ANGLE FOR TORQUE PRODUCTION AFTER REPEATED BOUTS OF MAXIMAL INTENSITY ECCENTRIC EXERCISES

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REZAEI MANDANA; VASSAGHI GHARAMALEKI BEHNOUSH; EBRAHIMI TAKAMJANI ISMAEL; JAMSHIDI ALI ASHRAF; HAVAEI NASER

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Journal: SCIENTIFIC JOURNAL OF REHABILITATION MEDICINE Year:2017 | Volume:6 | Issue:2 Page(s): 131-140

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Title

CHANGE OF OPTIMUM ANGLE FOR TORQUE PRODUCTION AFTER REPEATED BOUTS OF MAXIMAL INTENSITY ECCENTRIC EXERCISES

Author(s)

Keywords

EXERCISEQ1

ECCENTRICQ1

ECCENTRIC EXERCISE-INDUCED MUSCLE DAMAGEQ1

OPTIMUM ANGLEQ1

REPEATED BOUT EFFECTQ1

Abstract

Background and aim: The purpose of the present study was to evaluate the effect of repeated bouts of maximal intensity ECCENTRIC EXERCISE at knee extensors on OPTIMUM ANGLE and ECCENTRIC EXERCISE-induced muscle damage indicators.Materials and Methods: A total of 15 untrained healthy females performed two bouts of maximal intensity ECCENTRIC EXERCISEs (6 sets*20 repetitions) at knee extensors with the time interval of two weeks. Isometric and concentric extensor torques, optimum torque angles, delayed onset muscle soreness, knee range of motion, and thigh circumference were measured before and immediately, 48 hours, and 5 days after two bouts of ECCENTRIC EXERCISEs.Results: Reduction of torques and range of motion, increase in OPTIMUM ANGLE, and delayed onset muscle soreness were significant after the first bout of ECCENTRIC EXERCISE. After the second bout, reductions in concentric torques and range of motion were less. OPTIMUM ANGLE at the velocity of 60 degree per second was increased and delayed onset muscle soreness was decreased at 48 hours after the second bout compared with that after the first bout (P<0.05).Conclusion: ECCENTRIC EXERCISE induced muscle damage was evident after the first bout of ECCENTRIC EXERCISE. Also, REPEATED BOUT EFFECT was observed after the second bout. A change of OPTIMUM ANGLE indirectly indicates the roll of cellar mechanisms in adaptation process to ECCENTRIC EXERCISEs.

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References

EFFECT OF ECCENTRIC EXERCISE-INDUCED MUSCLE DAMAGE ON ELECTROMYOGRAPHYIC ACTIVITY OF QUADRICEPS IN UNTRAINED HEALTHY FEMALES

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APA: Copy

REZAEI, MANDANA, VASSAGHI GHARAMALEKI, BEHNOUSH, EBRAHIMI TAKAMJANI, ISMAEL, JAMSHIDI, ALI ASHRAF, & HAVAEI, NASER. (2017). CHANGE OF OPTIMUM ANGLE FOR TORQUE PRODUCTION AFTER REPEATED BOUTS OF MAXIMAL INTENSITY ECCENTRIC EXERCISES. SCIENTIFIC JOURNAL OF REHABILITATION MEDICINE, 6(2), 131-140. SID. https://sid.ir/paper/239781/en

Vancouver: Copy

REZAEI MANDANA, VASSAGHI GHARAMALEKI BEHNOUSH, EBRAHIMI TAKAMJANI ISMAEL, JAMSHIDI ALI ASHRAF, HAVAEI NASER. CHANGE OF OPTIMUM ANGLE FOR TORQUE PRODUCTION AFTER REPEATED BOUTS OF MAXIMAL INTENSITY ECCENTRIC EXERCISES. SCIENTIFIC JOURNAL OF REHABILITATION MEDICINE[Internet]. 2017;6(2):131-140. Available from: https://sid.ir/paper/239781/en

IEEE: Copy

MANDANA REZAEI, BEHNOUSH VASSAGHI GHARAMALEKI, ISMAEL EBRAHIMI TAKAMJANI, ALI ASHRAF JAMSHIDI, and NASER HAVAEI, “CHANGE OF OPTIMUM ANGLE FOR TORQUE PRODUCTION AFTER REPEATED BOUTS OF MAXIMAL INTENSITY ECCENTRIC EXERCISES,” SCIENTIFIC JOURNAL OF REHABILITATION MEDICINE, vol. 6, no. 2, pp. 131–140, 2017, [Online]. Available: https://sid.ir/paper/239781/en

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