The effect of including the Nordic Hamstring exercise on sprint and jump performance in athletes: protocol of a systematic review and meta-analyses

Abstract

The Nordic Hamstring Exercise reduces hamstring strain injuries in football and other sports, but the exercise is not well adopted in practice. Barriers from practitioners include fear of performance decrements, due to lack of specificity of the exercise with high speed running. However, in theory, increased eccentric hamstring strength could transfer to faster sprinting due to higher horizontal force production. Studies on the effect of the Nordic Hamstring Exercise on performance have been conflicting and no synthesis of the evidence exists. We therefore pose the following question: does including the Nordic Hamstring exercise hamper sprint or jump performance in athletes? We will answer this question by performing a systematic review of the literature, critically appraise relevant studies, and GRADE the evidence across key outcomes and perform meta-analyses, meta-regression and subgroup analyses. In this protocol we outline the planned methods and procedures.

Study on Hamstring Re-injury Prevention (SHARP): protocol for an international multicentre, randomised controlled trial

“…For the sprint and jump performance substudy, we expect a 4% sprint19 41 and 7% vertical jump18 20 42 improvement in the Nordics group compared with the CON group. Accepting 80% statistical power with a significant level of 0.05, SD of 0.05 for sprint and 3 cm for vertical jump, and an estimated dropout rate of 10%, we calculate that 36 subjects will need to be recruited (18 subjects each group).…”

“…In addition to the preventive effect, there is emerging evidence that NHE may improve sprint and jump performance. [18][19][20] This has never been investigated in football players directly after RTP. Evaluating NHE's effect on performance is valuable as an additional consideration to coaches and football players in implementing the programme.…”

“…In addition to the preventive effect, there is emerging evidence that NHE may improve sprint and jump performance 18–20. This has never been investigated in football players directly after RTP.…”

PENGARUH ECCENTRIC HAMSTRING EXERCISE TERHADAP PENINGKATAN KECEPATAN BERLARI PADA PEMAIN SEPAKBOLA (Studi Literatur)

“…Dalam penelitian (Ishøi et al, 2018) eccentric hamstring exercise mampu untuk meningkatkan kecepatan berlari pada pemain sepakbola setelah dilakukan latihan selama 3 kali seminggu selama 10 minggu. Kemudian peneliti mendapatkan protokol untuk membuat literature review yang dibuat oleh (Krommes et al, 2020) yang dapat digunakan sebagai salah satu acuan untuk melakukan penelitian berjenis literature review.…”