Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2024 Jun 18;16(1):134.
doi: 10.1186/s13102-024-00923-4.

Relationship between hamstring strength and hop performance at 8 and 12 months after ACL reconstruction with hamstring tendon autografts

Johan Högberg  1   2   3 , Jakob Lindskog  4   5 , Axel Sundberg  5   6   7 , Ramana Piussi  4   5   6 , Rebecca Simonsson  4   5   6 , Kristian Samuelsson  5   8   9 , Roland Thomeé  4   6 , Eric Hamrin Senorski  4   5   6
Affiliations

Relationship between hamstring strength and hop performance at 8 and 12 months after ACL reconstruction with hamstring tendon autografts

Johan Högberg et al. BMC Sports Sci Med Rehabil. .

Abstract

Background: The relationship between hamstring strength and hop performance after anterior cruciate ligament (ACL) reconstruction with hamstring tendon (HT) autografts has not been well elucidated. The aim was to investigate the relationship between eccentric hamstring strength, assessed with the NordBord, and concentric hamstring strength, assessed with the Biodex, with hop performance at 8 and 12 months after ACL reconstruction.

Methods: Registry study. Patients ≥ 16 years who had undergone primary ACL reconstruction with HT autograft, followed by muscle strength and hop tests at 8 and 12 months were included. Correlations of the relative hamstring strength (Nm/kg or N/kg) and limb symmetry index (LSI) with hop performance were analyzed. Pearson's correlation coefficient, and coefficient of determination (r2) were used for statistical analysis.

Results: A total of 90 patients were included, of which 48 (53%) were women. The mean age at ACL reconstruction was 27.0 ± 8.0 years. Relative hamstring strength had significant positive correlations with hop performance, ranging from r = 0.25-0.66, whereas hamstring strength LSI had significant positive correlations which ranged from r = 0.22-0.37 at 8 and 12 months after ACL reconstruction. At 12 months, the relative hamstring strength in the Biodex explained 32.5-43.6% of the hop performance in vertical hop height, hop for distance relative to height, and the total number of side hops, whereas the relative hamstring strength in the NordBord explained 15.2-23.0% of the hop performance.

Conclusion: The relative hamstring strength in the Biodex test explained 32.5-43.6% of the hop performance, whereas the relative hamstring strength in the NordBord explained 15.2-23.0%. Thus, our findings suggest that relative hamstring strength, especially in the hip-flexed position may be a better indicator of hop performance at 8 and 12 months after ACL reconstruction in patients treated with HT autograft.

Keywords: Anterior cruciate ligament; Hamstring tendon autograft; Hop performance; Isokinetic dynamometer; NordBord.

PubMed Disclaimer

Conflict of interest statement

The authors declare no competing financial interests or personal relationships that may have influenced the work reported in this study.

Figures

Fig. 1
Fig. 1
The isokinetic concentric seated leg-curl test performed in the Biodex
Fig. 2
Fig. 2
The eccentric Nordic hamstring exercise performed in the NordBord
Fig. 3
Fig. 3
Flowchart of inclusion and exclusion
Fig. 4
Fig. 4
Coefficient of determination for hamstring strength limb symmetry index and hop performance at 8 months to the left, and 12 months to the right
Fig. 5
Fig. 5
Coefficient of determination for relative hamstring strength and hop performance at 8 months to the left and 12-month to the right
See this image and copyright information in PMC

Similar articles

See all similar articles

References

    1. Arnold MP, Calcei JG, Vogel N, Magnussen RA, Clatworthy M, Spalding T, et al. ACL Study Group survey reveals the evolution of anterior cruciate ligament reconstruction graft choice over the past three decades. Knee Surg Sports Traumatol Arthrosc. 2021;29(11):3871–6. doi: 10.1007/s00167-021-06443-9. - DOI - PubMed
    1. Noyes FR, Butler DL, Grood ES, Zernicke RF, Hefzy MS. Biomechanical analysis of human ligament grafts used in knee-ligament repairs and reconstructions. J Bone Joint Surg Am. 1984;66(3):344–52. doi: 10.2106/00004623-198466030-00005. - DOI - PubMed
    1. Speedtsberg MB, Zebis MK, Lauridsen HB, Magnussen E, Holmich P. Anatomical retraction of the semitendinosus muscle following harvest of the distal semitendinosus tendon for ACL reconstruction. Knee surgery, sports traumatology, arthroscopy: official journal of the ESSKA. 2022;30(5):1706-10.1007/s00167-021-06718-1. - PubMed
    1. du Moulin W, Bourne M, Diamond LE, Konrath J, Vertullo C, Lloyd D, et al. Shape differences in the semitendinosus following tendon harvesting for anterior cruciate ligament reconstruction. J Orthop Research: Official Publication Orthop Res Soc. 2023;41(1):44–53. doi: 10.1002/jor.25337. - DOI - PMC - PubMed
    1. Solomonow M, Baratta R, Zhou BH, Shoji H, Bose W, Beck C, et al. The synergistic action of the anterior cruciate ligament and thigh muscles in maintaining joint stability. Am J Sports Med. 1987;15(3):207–13. doi: 10.1177/036354658701500302. - DOI - PubMed

LinkOut - more resources