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Progressive Workload Periodization Maximizes Effects of Nordic Hamstring Exercise on Muscle Injury Risk Factors

Journal Article


Abstract


  • ABSTRACT: Severo-Silveira, L, Dornelles, MP, Lima-e-Silva, FX, Marchiori, CL, Medeiros, TM, Pappas, E, and Baroni, BM. Progressive workload periodization maximizes effects of Nordic hamstring exercise on muscle injury risk factors. J Strength Cond Res 35(4): 1006-1013, 2021-This study aimed to investigate the effect of 2 different Nordic hamstring exercise (NHE) training programs (constant workload vs. progressive workload) on multiple risk factors for hamstring strain injury in high competitive level athletes. Twenty-one premier league rugby union players (���26 years) were randomized into 1 of 2 experimental groups and completed an 8-week NHE training program: constant training group (CTG) or progressive training group (PTG). Knee flexor/extensor strength and biceps femoris long head (BFLH) muscle architecture were assessed through isokinetic dynamometry and ultrasonography, respectively, before and after the training programs. Increased hamstring concentric (�� = 8%, p = 0.004, d = 0.42) and eccentric (�� = 7%, p = 0.041, d = 0.39) peak torques, as well as H:Q conventional (�� = 7%, p = 0.015, d = 0.54) and functional (�� = 6%, p = 0.026, d = 0.62) ratios were observed in the follow-up compared with baseline for the PTG group only. Nordic hamstring exercise training significantly increased BFLH muscle thickness (CTG: �� = 7%, p = 0.001, d = 0.60; PTG: �� = 7%, p < 0.001, d = 0.54) and fascicle length (CTG: �� = 8%, p < 0.001, d = 0.29; PTG: �� = 10%, p < 0.001, d = 0.35) in both groups. Training adaptations on hamstring peak torque (concentric and eccentric) and H:Q ratio (conventional and functional) "likely favor" PTG, whereas changes in BFLH fascicle length "possibly favor" PTG. In conclusion, only PTG enhanced hamstring strength; both NHE training programs increased BFLH muscle thickness and fascicle length, but progressive training generated greater changes on fascicle length than constant training. Medical/coaching staff should be aware that NHE with adequate training periodization with workload progression to maximize its benefits.

Publication Date


  • 2021

Citation


  • Severo-Silveira, L., Dornelles, M. P., Lima-E-Silva, F. X., Marchiori, C. L., Medeiros, T. M., Pappas, E., & Baroni, B. M. (2021). Progressive Workload Periodization Maximizes Effects of Nordic Hamstring Exercise on Muscle Injury Risk Factors. Journal of strength and conditioning research, 35(4), 1006-1013. doi:10.1519/JSC.0000000000002849

Scopus Eid


  • 2-s2.0-85103361573

Start Page


  • 1006

End Page


  • 1013

Volume


  • 35

Issue


  • 4

Place Of Publication


Abstract


  • ABSTRACT: Severo-Silveira, L, Dornelles, MP, Lima-e-Silva, FX, Marchiori, CL, Medeiros, TM, Pappas, E, and Baroni, BM. Progressive workload periodization maximizes effects of Nordic hamstring exercise on muscle injury risk factors. J Strength Cond Res 35(4): 1006-1013, 2021-This study aimed to investigate the effect of 2 different Nordic hamstring exercise (NHE) training programs (constant workload vs. progressive workload) on multiple risk factors for hamstring strain injury in high competitive level athletes. Twenty-one premier league rugby union players (���26 years) were randomized into 1 of 2 experimental groups and completed an 8-week NHE training program: constant training group (CTG) or progressive training group (PTG). Knee flexor/extensor strength and biceps femoris long head (BFLH) muscle architecture were assessed through isokinetic dynamometry and ultrasonography, respectively, before and after the training programs. Increased hamstring concentric (�� = 8%, p = 0.004, d = 0.42) and eccentric (�� = 7%, p = 0.041, d = 0.39) peak torques, as well as H:Q conventional (�� = 7%, p = 0.015, d = 0.54) and functional (�� = 6%, p = 0.026, d = 0.62) ratios were observed in the follow-up compared with baseline for the PTG group only. Nordic hamstring exercise training significantly increased BFLH muscle thickness (CTG: �� = 7%, p = 0.001, d = 0.60; PTG: �� = 7%, p < 0.001, d = 0.54) and fascicle length (CTG: �� = 8%, p < 0.001, d = 0.29; PTG: �� = 10%, p < 0.001, d = 0.35) in both groups. Training adaptations on hamstring peak torque (concentric and eccentric) and H:Q ratio (conventional and functional) "likely favor" PTG, whereas changes in BFLH fascicle length "possibly favor" PTG. In conclusion, only PTG enhanced hamstring strength; both NHE training programs increased BFLH muscle thickness and fascicle length, but progressive training generated greater changes on fascicle length than constant training. Medical/coaching staff should be aware that NHE with adequate training periodization with workload progression to maximize its benefits.

Publication Date


  • 2021

Citation


  • Severo-Silveira, L., Dornelles, M. P., Lima-E-Silva, F. X., Marchiori, C. L., Medeiros, T. M., Pappas, E., & Baroni, B. M. (2021). Progressive Workload Periodization Maximizes Effects of Nordic Hamstring Exercise on Muscle Injury Risk Factors. Journal of strength and conditioning research, 35(4), 1006-1013. doi:10.1519/JSC.0000000000002849

Scopus Eid


  • 2-s2.0-85103361573

Start Page


  • 1006

End Page


  • 1013

Volume


  • 35

Issue


  • 4

Place Of Publication