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Biceps Femoris Muscle is Activated by Performing Nordic Hamstring Exercise at a Shallow Knee Flexion Angle
- Source :
- J Sports Sci Med, Journal of Sports Science and Medicine, Vol 20, Iss 2, Pp 275-283 (2021)
- Publication Year :
- 2021
- Publisher :
- Uludag University, 2021.
-
Abstract
- The semitendinosus (ST) muscle is primarily used during Nordic hamstring exercise (NHE), which is often prescribed for preventing hamstring injury, though the biceps femoris long head (BFlh) muscle that is more susceptible to injuries. Thus, this study aimed to identify the modulation of BFlh muscle activity with different knee flexion angles during NHE using an inclined platform. Fourteen male athletes performed NHE and maintained their position at maximum inclination (NH). Subjects also performed isometric NHE using a platform inclined to 50° (ICL) and 40° (ICH), and the knee flexion angle was controlled to 50° and 30°. The electromyography (EMG) activity of the BFlh, ST, semimembranosus, gluteus maximus, elector spinae, and rectus abdominus muscles was determined during each exercise. The EMG of the ST was higher than that of the BFlh during NHE and the highest of all muscles in all exercises (p < 0.05). Moreover, the activity of the BFlh tended to be higher than that of the ST for ICH than for ICL, regardless of the knee joint angle. The activity of the BFlh becomes equivalent to that of the ST during NHE at a knee flexion angle of less than 50°. These results indicate that performing NHE at a shallow knee flexion angle will enhance the activity of the BFlh muscle.
- Subjects :
- musculoskeletal diseases
Male
medicine.medical_specialty
Knee flexion
Physical Therapy, Sports Therapy and Rehabilitation
Hamstring Muscles
Isometric exercise
Electromyography
Knee Joint
preventive medicine
Biceps
03 medical and health sciences
Young Adult
0302 clinical medicine
Physical medicine and rehabilitation
Isometric Contraction
Medicine
Humans
Orthopedics and Sports Medicine
Knee
Muscle Strength
Muscle, Skeletal
Hamstring injury
muscle strain injury
030222 orthopedics
medicine.diagnostic_test
business.industry
030229 sport sciences
medicine.disease
musculoskeletal system
Biomechanical Phenomena
Biceps femoris muscle
GV557-1198.995
Sports medicine
physical conditioning
business
RC1200-1245
Hamstring
Sports
Research Article
Physical Conditioning, Human
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- J Sports Sci Med, Journal of Sports Science and Medicine, Vol 20, Iss 2, Pp 275-283 (2021)
- Accession number :
- edsair.doi.dedup.....42d925ab8461a1c429b529de1812b8c6