Tags

Type your tag names separated by a space and hit enter

Effect of different knee flexion angles with a constant hip and knee torque on the muscle forces and neuromuscular activities of hamstrings and gluteus maximus muscles.
Eur J Appl Physiol. 2019 Feb; 119(2):399-407.EJ

Abstract

PURPOSE

This study examined the effect of different knee flexion angles with a constant hip and knee torque on the muscle force and neuromuscular activity of the hamstrings and gluteus maximus.

METHODS

Twenty healthy males lay in prone position and held their lower limb with hip flexion at 45° and knee flexion at either 10° or 80°. At these angles, the hip and knee torques are identical. Under three load conditions: passive (referred to as Unloaded), active (Loaded), and active with 3-kg weight added to the shank (Loaded + 3 kg), the muscle stiffness (i.e., an indicator of muscle force) and neuromuscular activity of the hamstrings and gluteus maximus were measured using shear wave elastography and surface electromyography.

RESULTS

The muscle stiffness and neuromuscular activity of the hamstrings and gluteus maximus increased significantly with the load. Muscle stiffness in the hamstrings was significantly lower at knee flexion of 80° than at 10° for Unloaded, but not for either Loaded or Loaded + 3 kg. The neuromuscular activity of the hamstrings was significantly greater at knee flexion of 80° than at 10° for both Loaded and Loaded + 3 kg. The muscle stiffness or neuromuscular activity of the gluteus maximus showed no significant differences between knee angles.

CONCLUSIONS

When the passive force in the hamstrings decreases with knee flexion, sufficient muscle force to maintain the hip and knee torques against an external load is generated by preferentially increasing the neuromuscular activity of the hamstrings, rather than increasing the synergetic muscle force.

Links

Publisher Full Text (DOI)

Authors+Show Affiliations

Motomura Y
Human Health Sciences, Graduate School of Medicine, Kyoto University, 53 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto, Kyoto, 606-8507, Japan. motomura.yoshiki.32z@st.kyoto-u.ac.jp.
Tateuchi H
Human Health Sciences, Graduate School of Medicine, Kyoto University, 53 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto, Kyoto, 606-8507, Japan.
Nakao S
Human Health Sciences, Graduate School of Medicine, Kyoto University, 53 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto, Kyoto, 606-8507, Japan.
Shimizu I
Department of Rehabilitation Medicine, Fukui General Clinic, Nittazuka Medical Welfare Center, 1-42-1 Nittazuka, Fukui, Fukui, 910-0067, Japan.
Kato T
Human Health Sciences, Graduate School of Medicine, Kyoto University, 53 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto, Kyoto, 606-8507, Japan.
Kondo Y
Human Health Sciences, Graduate School of Medicine, Kyoto University, 53 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto, Kyoto, 606-8507, Japan.
Ichihashi N
Human Health Sciences, Graduate School of Medicine, Kyoto University, 53 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto, Kyoto, 606-8507, Japan.

MeSH

AdultBiomechanical PhenomenaElectromyographyHamstring MusclesHip JointHumansKnee JointMaleMuscle, SkeletalRange of Motion, ArticularTorque

Pub Type(s)

Journal Article

Language

eng

PubMed ID

30430278

Citation

Motomura, Yoshiki, et al. "Effect of Different Knee Flexion Angles With a Constant Hip and Knee Torque On the Muscle Forces and Neuromuscular Activities of Hamstrings and Gluteus Maximus Muscles." European Journal of Applied Physiology, vol. 119, no. 2, 2019, pp. 399-407.
Motomura Y, Tateuchi H, Nakao S, et al. Effect of different knee flexion angles with a constant hip and knee torque on the muscle forces and neuromuscular activities of hamstrings and gluteus maximus muscles. Eur J Appl Physiol. 2019;119(2):399-407.
Motomura, Y., Tateuchi, H., Nakao, S., Shimizu, I., Kato, T., Kondo, Y., & Ichihashi, N. (2019). Effect of different knee flexion angles with a constant hip and knee torque on the muscle forces and neuromuscular activities of hamstrings and gluteus maximus muscles. European Journal of Applied Physiology, 119(2), 399-407. https://doi.org/10.1007/s00421-018-4032-7
Motomura Y, et al. Effect of Different Knee Flexion Angles With a Constant Hip and Knee Torque On the Muscle Forces and Neuromuscular Activities of Hamstrings and Gluteus Maximus Muscles. Eur J Appl Physiol. 2019;119(2):399-407. PubMed PMID: 30430278.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effect of different knee flexion angles with a constant hip and knee torque on the muscle forces and neuromuscular activities of hamstrings and gluteus maximus muscles. AU - Motomura,Yoshiki, AU - Tateuchi,Hiroshige, AU - Nakao,Sayaka, AU - Shimizu,Itsuroh, AU - Kato,Takehiro, AU - Kondo,Yuta, AU - Ichihashi,Noriaki, Y1 - 2018/11/14/ PY - 2018/04/07/received PY - 2018/11/02/accepted PY - 2018/11/16/pubmed PY - 2019/5/30/medline PY - 2018/11/16/entrez KW - Electromyography KW - Gluteus maximus KW - Hamstrings KW - Muscle force KW - Neuromuscular activity KW - Shear wave elastography SP - 399 EP - 407 JF - European journal of applied physiology JO - Eur J Appl Physiol VL - 119 IS - 2 N2 - PURPOSE: This study examined the effect of different knee flexion angles with a constant hip and knee torque on the muscle force and neuromuscular activity of the hamstrings and gluteus maximus. METHODS: Twenty healthy males lay in prone position and held their lower limb with hip flexion at 45° and knee flexion at either 10° or 80°. At these angles, the hip and knee torques are identical. Under three load conditions: passive (referred to as Unloaded), active (Loaded), and active with 3-kg weight added to the shank (Loaded + 3 kg), the muscle stiffness (i.e., an indicator of muscle force) and neuromuscular activity of the hamstrings and gluteus maximus were measured using shear wave elastography and surface electromyography. RESULTS: The muscle stiffness and neuromuscular activity of the hamstrings and gluteus maximus increased significantly with the load. Muscle stiffness in the hamstrings was significantly lower at knee flexion of 80° than at 10° for Unloaded, but not for either Loaded or Loaded + 3 kg. The neuromuscular activity of the hamstrings was significantly greater at knee flexion of 80° than at 10° for both Loaded and Loaded + 3 kg. The muscle stiffness or neuromuscular activity of the gluteus maximus showed no significant differences between knee angles. CONCLUSIONS: When the passive force in the hamstrings decreases with knee flexion, sufficient muscle force to maintain the hip and knee torques against an external load is generated by preferentially increasing the neuromuscular activity of the hamstrings, rather than increasing the synergetic muscle force. SN - 1439-6327 UR - https://www.unboundmedicine.com/medline/citation/30430278/Effect_of_different_knee_flexion_angles_with_a_constant_hip_and_knee_torque_on_the_muscle_forces_and_neuromuscular_activities_of_hamstrings_and_gluteus_maximus_muscles_ DB - PRIME DP - Unbound Medicine ER -