The kinematic differences and distribution of joint loads according to squat type

이상우,; Jin, Moon Young; Deok, Eun Seon

doi:10.24985/kjss.2011.22.1.1674

Cited by 8 publications

(1 citation statement)

References 8 publications

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“…The participants were instructed to perform back squats. A back squat is a squat method that involves placing a barbell on the trapezius and posterior deltoid muscles [ 23 ]. After being weighed, the participants were then instructed to lift 25%, 50%, 100%, and 125% of their body weight.…”

Section: Methodsmentioning

confidence: 99%

Effects of load increase on lower extremity kinetic and kinematic variables in the back squat exercise

Sohn

Koo

2023

THC

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BACKGROUND: Squats are one of the most widely used weight training methods worldwide, and the single most ubiquitous with regard to multi-joint resistance training. OBJECTIVE: The objective of the present study was to investigate kinematic and kinetic changes in the lower extremities as a result of load increases during a back squat exercise, and to propose an association between back squats and lower extremity injuries. METHODS: Eight individuals with experience of back squat training were recruited. The subjects performed back squats with loads of 25%, 50%, 100%, and 125% of their body weight. During the performance, the center of pressure (COP) sway; vertical center of mass (COM) velocity; joint moment; joint range of motion (ROM) of flexion/extension and adduction/abduction; and rotation of the ankle, knee, and hip joints were measured. RESULTS: The participants’ lower extremity joint ROM, vertical COM velocity, and COP variability did not change significantly with changes in weight loading. However, the moments applied to the lower extremity joints differed according to changes in barbell weight. The moments of plantar flexion (f= 54.362, p< 0.001), dorsiflexion (f= 8.475, p< 0.001), knee flexion (f= 12.013, p< 0.001), knee extension (f= 8.581, p< 0.001), hip flexion (f= 5.111, p< 0.001), and hip extension (f= 11.053, p< 0.001) increased in the sagittal plane (flexion/extension). There was also a significant increase in ankle eversion (f= 5.612, p= 0.004), hip abduction (f= 3.242, p= 0.037), and adduction (f= 5.846, p= 0.003) in the frontal plane (adduction/abduction). Among the moment variables in the transverse plane (rotation), there were significant differences in ankle internal rotation (f= 7.043, p= 0.001) and hip external rotation (f= 11.070, p< 0.001). CONCLUSION: As the barbell load increased, posture and performance were maintained, but rotational moments of the joints differed. It is expected that the joint directions that showed significant differences in this study are likely to be vulnerable to the risk of injury when an excessive load is applied to the body. Examples include the hip adduction moment, hip external rotation moment, and ankle internal rotation moment, and apply regardless of the increase in the rotational moments of joints from load increases.

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Section: Methodsmentioning

confidence: 99%

Effects of load increase on lower extremity kinetic and kinematic variables in the back squat exercise

Sohn

Koo

2023

THC

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A Study on Impact of Squat Exercise on Foot Pressure with different loads

원효헌¹,

김민욱²,

배영훈³

et al. 2013

Journal of Fisheries and Marine Sciences Education

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This study is purposed to propose indices in order to achieve goals such as preventing one-sided movement of balance, preventing injuries to joints of legs, improving muscular strength of legs, and maximizing sporting achievement. In terms of methodology, this study has compared foot pressure distribution during squat exercise. This study targets 10 male students in their 20s of Department of Physical Education and 10 male students in their 20s of other departments of P University located in B City. Skilled members have been selected out of those who have had regular weight training experiences for last 3 years. As a result of analysis on impact of squat exercise on foot pressure, conclusions have been obtained as shown below. As a result of analysis on foot pressure distribution of back feet of skilled members and unskilled members during squat exercise, it was found out that foot pressure of left foot of skilled members was 0.13 f/s, and that of unskilled members was 0.28 f/s, showing significant difference ㎏㎏ (p<.01). As a result of analysis on foot pressure ratio of back feet of skilled members and unskilled members during squat exercise, it was found out that foot pressure ratio of left foot of skilled members was 50.03%, and that of unskilled members was 67.18%, showing significant difference(p<.01).

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Sports Biomechanical Analysis before and after Applying Weight Belt during Squat Exercise

Jeong-Ki¹,

Heo²,

Kim³

et al. 2016

Journal of Fisheries and Marine Sciences Education

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The kinematic differences and distribution of joint loads according to squat type

Cited by 8 publications

References 8 publications

Effects of load increase on lower extremity kinetic and kinematic variables in the back squat exercise

Effects of load increase on lower extremity kinetic and kinematic variables in the back squat exercise

A Study on Impact of Squat Exercise on Foot Pressure with different loads

Sports Biomechanical Analysis before and after Applying Weight Belt during Squat Exercise

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