Journal of Sports Science and Medicine
Journal of Sports Science and Medicine
ISSN: 1303 - 2968   
Ios-APP Journal of Sports Science and Medicine
Androit-APP Journal of Sports Science and Medicine
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©Journal of Sports Science and Medicine (2020) 19, 500 - 507

Research article
How Are Squat Timing and Kinematics in The Sagittal Plane Related to Squat Depth?
Magdalena Zawadka1, , Jakub Smolka2, Maria Skublewska-Paszkowska2, Edyta Lukasik2, Piotr Gawda1
Author Information
1 Department of Sports Medicine, Faculty of Health Sciences, Medical University of Lublin, Lublin, Poland
2 Department of Computer Science, Faculty of Electrical Engineering and Computer Science, Lublin University of Technology, Lublin, Poland

Magdalena Zawadka
‚úČ Medical University of Lublin, Chodzki 7 street, 20-093 Lublin, Poland
Email: magdlenzawadka91@gmail.com
Publish Date
Received: 31-03-2020
Accepted: 01-06-2020
Published (online): 01-09-2020
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ABSTRACT

The aim of this study was to analyze the relationship of range of motion (ROM) in the sagittal plane and timing parameters during a bodyweight squat to the depth of the squat. Sixty participants (20 females and 40 males) took part in this study. They were instructed to perform a bodyweight squat to the maximal depth position. Kinematic data were obtained using the optical motion capture system. The time for the descent phase of squatting was normalized from 0% (initial position, start of movement) to 100% (squat position-stop of movement). The ROM of ankle, knee, hip, pelvis and spine in the sagittal plane and the normalized time when the maximum joint angles occurred during the descent were analyzed to investigate the relationship between them and the squat depth in males and females. The knee ROM contributed most significantly, from all joints to squatting depth in both females and males (r = 0.92, p < 0.001). The squat depth was related to lumbar, hip and knee motion in females and to all kinematics parameters in males. Maximal ankle dorsiflexion and pelvis anterior tilt were reached earlier than the maximal angles of knee, hip and spine during squatting. Pelvis and ankle timing was negatively correlated with the squat depth (rs = -0.64, p < 0.001 and rs = -0.29, p = 0.02, respectively). This suggests that pelvis and ankle timing can be important to keeping balance during squatting and can lead to achieving the desired depth.

Key words: Squat depth, lumbar spine, pelvis, ankle, kinematics


           Key Points
  • This study aimed to analyze the relationship of range of motion (ROM) in the sagittal plane and timing parameters to the squat depth during a bodyweight squat.
  • Pelvis and ankle timing was negatively correlated with the squat depth, which suggests that pelvis and ankle timing can be important in keeping balance during squatting and can lead to achieving the desired depth of the squat.
  • During squatting maximal ankle dorsiflexion and pelvis anterior tilt were reached earlier than the maximal angles of knee, hip and spine.
 
 
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