The effect of back squat depth and load on lower body muscle activity in group exercise participants

O’Neill, Kathy E.; Psycharakis, Stelios G.

doi:10.1080/14763141.2021.1875034

Cited by 2 publications

(7 citation statements)

References 21 publications

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“…O'neil et al 20 observed that mean activity of vastus lateralis was 1.3-1.4-fold greater at 90° than at 125° for 23 BWL and 38 BWL. Peak activity was 1.8-1.9-fold greater at 90° of knee flexion.…”

Section: Electromiographic Activitymentioning

confidence: 98%

“…On further evaluation of full texts (ABC and FCS), 11 papers were excluded. Therefore, four studies 6,11,19,20 fulfilled all inclusion criteria and underwent critical appraisal.…”

Section: Selection Of Studiesmentioning

confidence: 99%

“…The studies were cross-sectional observational studies, which included 10 to 15 young subjects (mean age = 31 years) with strength training experience. Two studies were composed by men 6,11 and two studies by women 19,20 in their samples (Table 1).…”

Section: Study Characteristicsmentioning

confidence: 99%

“…O'neil et al 20 performed squat in four conditions: 90° knee angle depth + 23% bodyweight load (BWL); 90° knee angle depth + 38% BWL; 125° knee angle depth + 23% BWL; and 125° knee angle depth + 38% BWL. Knee angle was defined as the non-reflex angle between the femur and the tibia.…”

Section: Study Proceduresmentioning

confidence: 99%

“…O'neil et al 20 controlled squat depth by requiring participants to contact a metal rod at the end of the descending phase. Tempo was controlled by instructing participants to squat to a 65 beats per minute (bpm) metronome tone.…”

Section: Squat Depth Controlmentioning

confidence: 99%

See 4 more Smart Citations

Knee extensor electromyographic activity during different depths of squat exercise in strength training experienced adults: A Systematic Review

Chagas,

Sonda,

Reichert

et al. 2024

BJMB

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B ACKGROUND: Changes in range of motion during partial and deep squats can affect the electrical activity of the knee extensor muscles. There are results’ divergences between studies that evaluated the effects of deep and partial squats on the electrical activity of the knee extensor muscles. AIM: To systematically review the literature on the electromyographic activity of the knee extensor muscles during partial and deep squat exercises in subjects with strength training experience. METHOD: The search included MEDLINE (via Pubmed), Scielo, EMBASE, in addition to a manual search, until June 2023. Cross-sectional observational studies comparing partial squats (up to 90º of knee flexion) and deep squats (maximum knee flexion) that evaluated the electrical activation through surface electromyography in men and women with strength training experience were included. Methodological quality assessment was performed using the adapted Downs and Black tool, as suggested by the Cochrane Collaboration. RESULTS: Of the 636 articles identified, four studies were included. The included studies presented electromyographic values of the two squat variations. No difference was found in the activation of the rectus femoris, vastus medialis and vastus lateralis muscles between partial and deep squats. Regarding methodological quality, one study was classified as having moderate and the other three studies showing high methodological quality. CONCLUSION: The similarity in the knee extensors’ electromyographic activation between partial and deep squat exercises in men and women with strength training experience suggests that both exercises can be used for recruiting these muscles during physical fitness activities.

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Section: Electromiographic Activitymentioning

confidence: 98%

“…On further evaluation of full texts (ABC and FCS), 11 papers were excluded. Therefore, four studies 6,11,19,20 fulfilled all inclusion criteria and underwent critical appraisal.…”

Section: Selection Of Studiesmentioning

confidence: 99%