. 2022 Feb 1;57(2):170-176. Show
doi: 10.4085/1062-6050-0019.21. Affiliations
Muscle Activation During Single-Legged Squat Is Affected by Position of the Nonstance LimbAnne Khuu et al. J Athl Train. 2022. AbstractContext: The single-legged squat (SLS) is appropriate for targeting activation, strengthening, and neuromuscular retraining of the gluteus maximus, gluteus medius, and quadriceps. However, the effects of different nonstance-limb positions on muscle activity have not been fully evaluated. Objective: To compare the muscle activity of selected stance-limb hip muscles during the SLS using 3 nonstance-limb positions: in front (SLS-Front), in the middle (SLS-Middle), and in back (SLS-Back). Design: Controlled laboratory study. Setting: Biomechanics laboratory. Patients or other participants: A total of 17 healthy adults (8 men, 9 women; age = 22.6 ± 3.6 years, height = 173.3 ± 10.7 cm, mass = 71.2 ± 11.0 kg) participated. Main outcome measure(s): Surface electromyographic data of the gluteus maximus, gluteus medius, lateral hamstrings, medial hamstrings, rectus femoris, and tensor fascia lata (TFL) as well as kinetic data of the hip and knee were collected while participants performed the 3 SLS tasks. Mean muscle-activation levels during the descent and ascent phases for the selected hip muscles and hip and knee kinetics in all 3 planes were compared for the 3 tasks. Each variable of interest was analyzed using a separate linear regression model with a generalized estimating equations correction. Results: Muscle-activation levels of the gluteus maximus, gluteus medius, medial hamstrings, rectus femoris, and TFL for the stance limb during descent (P ≤ .04) and the medial hamstrings and TFL during ascent (P ≤ .002) were different among the SLS tasks. The greatest number of differences occurred between SLS-Front and SLS-Back. During descent, gluteal muscle activity was greater in SLS-Front (P ≤ .03) and SLS-Middle (P = .03) than in SLS-Back. For both phases, TFL activity was greater during SLS-Front than during both SLS-Middle and SLS-Back (P ≤ .006). Kinetic differences at the hip and knee between SLS tasks were also observed (P values ≤ .02). Conclusions: The 3 SLS tasks had different muscle-activation and kinetic profiles. Clinicians and researchers can vary nonstance-limb position during the SLS to manipulate muscle-activation levels and tailor the exercise to assist with goals at different stages of rehabilitation. Keywords: biomechanics; movement analysis; muscle activity; therapeutic exercise. © by the National Athletic Trainers' Association, Inc. Similar articles
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What area of the body is most targeted during the singleWith one leg behind you and elevated off of the ground, this exercise targets many of the same muscles as a traditional squat, but with an emphasis on the quads.
Which muscles are being worked during the single leg chair squat exercise?Single Leg Chair Squat
Strengthens glutes, hamstrings, and core. Stand in front of a chair and balance on one leg. Slowly and controlled squat to sit down on the chair. The raised leg should remain straight with the foot flexed.
What does singleSince balancing requires significant muscle activation, it can improve your mobility, balance, muscle coordination, and core strength. The single-leg squat activate the hips, quadriceps, hamstrings, gluteal muscles, calves, and other supporting muscles like the abdominal muscles.
Are single leg squats better?A single-legged squat can produce a greater sum of force when compared to its bilateral (two-legged) counterpart. This is a phenomenon known as a bilateral deficiency. Two quadriceps (thigh muscle) contracting together cannot generate as much force as the sum of both contracting alone.
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What area of the body is most targeted during a single leg squat to row exercise?
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