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Single-Leg Squat Delicacies-The Position of the Nonstance Limb is an Important Consideration.
J Sport Rehabil 2019; 28(4):318-324JS

Abstract

Context:

The single-leg squat task is often used as a rehabilitative exercise or as a screening tool for the functional movement of the lower limb.

Objective:

To establish the effect of 3 different positions of the nonstance leg on 3-dimensional kinematics, muscle activity, and center of mass displacement during a single-leg squat.

Design:

Within-subjects, repeated-measures design.

Setting:

Movement analysis laboratory.

Participants:

A total of 10 participants, aged 28.2 (4.42) years performed 3 squats to 60° of knee flexion with the nonstance (1) hip at 90° flexion and knee at 90° flexion, (2) hip at 30° flexion with the knee fully extended, or (3) hip in neutral/0° and the knee flexed to 90°. Main Outcome Measures: Trunk, hip, knee and ankle joint angles, and center of mass displacement were recorded with inertial sensors while muscle activity was captured through wireless electromyography.

Results:

Most trunk flexion (21.38° [18.43°]) occurred with the nonstance hip at 90° and most flexion of the stance hip (23.10° [6.60°]) occurred with the nonstance hip at 0°. Biceps femoris activity in the 90° squat was 40% more than in the 0° squat, whereas rectus femoris activity in the 0° squat was 29% more than in the 90° squat.

Conclusion:

The position of the nonstance limb should be standardized when the single-leg squat is used for assessment and be adapted to the aim when used in rehabilitation.

Authors

No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

30426818

Citation

Olivier, Benita, et al. "Single-Leg Squat Delicacies-The Position of the Nonstance Limb Is an Important Consideration." Journal of Sport Rehabilitation, vol. 28, no. 4, 2019, pp. 318-324.
Olivier B, Quinn SL, Benjamin N, et al. Single-Leg Squat Delicacies-The Position of the Nonstance Limb is an Important Consideration. J Sport Rehabil. 2019;28(4):318-324.
Olivier, B., Quinn, S. L., Benjamin, N., Green, A. C., Chiu, J., & Wang, W. (2019). Single-Leg Squat Delicacies-The Position of the Nonstance Limb is an Important Consideration. Journal of Sport Rehabilitation, 28(4), pp. 318-324. doi:10.1123/jsr.2018-0181.
Olivier B, et al. Single-Leg Squat Delicacies-The Position of the Nonstance Limb Is an Important Consideration. J Sport Rehabil. 2019 May 1;28(4):318-324. PubMed PMID: 30426818.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Single-Leg Squat Delicacies-The Position of the Nonstance Limb is an Important Consideration. AU - Olivier,Benita, AU - Quinn,Samantha-Lynn, AU - Benjamin,Natalie, AU - Green,Andrew Craig, AU - Chiu,Jessica, AU - Wang,Weijie, Y1 - 2019/01/09/ PY - 2018/11/15/pubmed PY - 2019/6/14/medline PY - 2018/11/15/entrez KW - assessment KW - center of mass KW - electromyography KW - kinematics KW - rehabilitation SP - 318 EP - 324 JF - Journal of sport rehabilitation JO - J Sport Rehabil VL - 28 IS - 4 N2 - Context: The single-leg squat task is often used as a rehabilitative exercise or as a screening tool for the functional movement of the lower limb. Objective: To establish the effect of 3 different positions of the nonstance leg on 3-dimensional kinematics, muscle activity, and center of mass displacement during a single-leg squat. Design: Within-subjects, repeated-measures design. Setting: Movement analysis laboratory. Participants: A total of 10 participants, aged 28.2 (4.42) years performed 3 squats to 60° of knee flexion with the nonstance (1) hip at 90° flexion and knee at 90° flexion, (2) hip at 30° flexion with the knee fully extended, or (3) hip in neutral/0° and the knee flexed to 90°. Main Outcome Measures: Trunk, hip, knee and ankle joint angles, and center of mass displacement were recorded with inertial sensors while muscle activity was captured through wireless electromyography. Results: Most trunk flexion (21.38° [18.43°]) occurred with the nonstance hip at 90° and most flexion of the stance hip (23.10° [6.60°]) occurred with the nonstance hip at 0°. Biceps femoris activity in the 90° squat was 40% more than in the 0° squat, whereas rectus femoris activity in the 0° squat was 29% more than in the 90° squat. Conclusion: The position of the nonstance limb should be standardized when the single-leg squat is used for assessment and be adapted to the aim when used in rehabilitation. SN - 1543-3072 UR - https://www.unboundmedicine.com/medline/citation/30426818/Single_Leg_Squat_Delicacies_The_Position_of_the_Nonstance_Limb_is_an_Important_Consideration_ L2 - https://journals.humankinetics.com/doi/10.1123/jsr.2018-0181 DB - PRIME DP - Unbound Medicine ER -