Neuromuscular activation of the adductor longus (AL) and adductor magnus (AM) muscles at different hip flexion angles during hip flexion and extension has not been clarified. This study aimed to compare the relationship between hip flexion angle and the electromyogram of the AL muscle with that of the AM muscle during isometric hip flexion and extension.
Fifteen healthy young men were included in this study. Participants performed maximal voluntary contractions during hip flexion and extension at six different hip flexion angles: − 20°, 0°, 20°, 40°, 60°, and 80°. The surface electromyograms of the AL and AM muscles were recorded. The root mean square (RMS) was calculated and normalized by the RMS during hip adduction for each individual muscle.
The normalized RMS of the AL muscle was significantly higher than that of the AM muscle at a hip flexion angle of − 20° during hip flexion (P < 0.05). The mean normalized RMS of the AM muscle was significantly higher than that of the AL muscle during hip extension (P < 0.01).
These results suggest that the AL muscle is recruited specifically at the hip-extended position during hip flexion, and that the AM muscle is recruited regardless of the hip position during hip extension. Thus, the AL and AM muscles may have different functional roles in different hip flexion angles.
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Analysis of variance
Maximal voluntary contraction
Root mean square
Akima H, Kinugasa R, Kuno S (2005) Recruitment of the thigh muscles during sprint cycling by muscle functional magnetic resonance imaging. Int J Sports Med 26:245–252
Akima H, Ushiyama J, Kubo J, Fukuoka H, Kanehisa H, Fukunaga T (2007) Effect of unloading on muscle volume with and without resistance training. Acta Astronaut 60:728–736
Charnock BL, Lewis CL, Garrett WE Jr, Queen RM (2009) Adductor longus mechanics during the maximal effort soccer kick. Sports Biomech 8:223–234
Dostal WF, Soderberg GL, Andrews JG (1986) Actions of hip muscles. Phys Ther 66:351–359
Green DL, Morris JM (1970) Role of adductor longus and adductor magnus in postural movements and in ambulation. Am J Phys Med Rehabil 49:223–240
Hoy MG, Zajac FE, Gordon ME (1990) A musculoskeletal model of the human lower extremity: the effect of muscle, tendon, and moment arm on the moment-angle relationship of musculotendon actuators at the hip, knee, and ankle. J Biomech 23:157–169
Hug F, Tucker K, Gennisson JL, Tanter M, Nordez A (2015) Elastography for muscle biomechanics: toward the estimation of individual muscle force. Exerc Sport Sci Rev 43:125–133
Neumann DA (2010) Kinesiology of the hip: a focus on muscular actions. J Orthop Sports Phys Ther 40:82–94
Portney LG, Watkins MP (2009) Foundations of clinical research: applications to practice, 3rd edn. Pearson Prentice Hall, Upper Saddle River, pp 585–618
Pressel T, Lengsfeld M (1998) Functions of hip joint muscles. Med Eng Phys 20:50–56
Serner A, Tol JL, Jomaah N, Weir A, Whiteley R, Thorborg K, Robinson M, Hölmich P (2015) Diagnosis of acute groin injuries: a prospective study of 110 athletes. Am J Sports Med 43:1857–1864
Takizawa M, Suzuki D, Ito H, Fujimiya M, Uchiyama E (2014) Why adductor magnus muscle is large: the function based on muscle morphology in cadavers. Scand J Med Sci Sports 24:197–203
Watanabe K, Katayama K, Ishida K, Akima H (2009) Electromyographic analysis of hip adductor muscles during incremental fatiguing pedaling exercise. Eur J Appl Physiol 106:815–825
We thank all of the volunteers who participated in this study.
This study received no funding.
Conflict of interest
The authors declare that they have no conflict of interest.
All experimental protocols were approved by the Medical Research Ethics Committee at Sapporo Medical University (approval number: 27-2-27).
The procedure, purpose, and risks associated with this study were explained to the subjects, and written informed consent was obtained.
Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
Communicated by Toshio Moritani.
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Kato, T., Taniguchi, K., Akima, H. et al. Effect of hip angle on neuromuscular activation of the adductor longus and adductor magnus muscles during isometric hip flexion and extension. Eur J Appl Physiol 119, 1611–1617 (2019). https://doi.org/10.1007/s00421-019-04150-5
- Hip adductor muscle group
- Isometric contraction
- Hip angle
- Neuromuscular activation