Reliability of kinematic parameters of Power Snatch from recreationally-trained weightlifters
 
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1
Department of Biological Sciences, Universidade Estadual do Sudoeste da Bahia, Brazil
 
2
Laboratory of Physiology and Biokinetics, Universidade Iguaçu, Brazil
 
3
Laboratory of Human Movement Studies, FUNITA, Brazil
 
4
Exercise Physiology Laboratory, Lenoir-Rhyne University, United States
 
5
Research group in Neuromuscular Physiology, Department of Biological Sciences, Universidade Estadual do Sudoeste da Bahia (UESB), Jequie, 45210-506, Bahia, Brazil, Universidade Estadual do Sudoeste da Bahia, Brazil
 
6
Integrative Physiology Research Center, Department of Biological Sciences, Universidade Estadual do Sudoeste da Bahia (UESB), Jequie, 45210-506, Bahia, Brazil, Universidade Estadual do Sudoeste da Bahia, Brazil
 
 
Submission date: 2021-03-22
 
 
Final revision date: 2021-04-29
 
 
Acceptance date: 2021-05-04
 
 
Publication date: 2021-09-30
 
 
Corresponding author
Rafael Pereira   

Research group in Neuromuscular Physiology, Department of Biological Sciences, Universidade Estadual do Sudoeste da Bahia (UESB), Jequie, 45210-506, Bahia, Brazil, Universidade Estadual do Sudoeste da Bahia, Rua José Moreira Sobrinho s/n, Jequiezinho, 45210-506, Jequie, Brazil
 
 
TRENDS in Sport Sciences 2021;28(3)
 
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ABSTRACT
Introduction:
The Olympic weightlifting movements (Snatch, Clean and Jerk) and their variations (snatch and clean deadlift, high pull etc) have been widely used in order to improve performance in many sports, but there are no normative data, nor data of reliability of kinematic parameters of power snatch from recreational weightlifters.

Aim of the study:
This study aimed to quantify the reliability and the MDC of kinematic parameters from bar displacement during a Power Snatch movement in non-professional (i.e., recreationally trained) weightlifters.

Material and methods:
Sixteen healthy (13 men), trained, but non-competitive weightlifters, volunteered in this study. Each volunteer performed 2 power snatches at 60% of own RM. Barbell path was recorded using a high-speed camera and the data was processed off-line to obtain barbell position coordinates. Elapsed time to complete movement, trunk and knee position at the catching, and the kinematic parameters from the horizontal and vertical bar displacements, and vertical velocity and acceleration were obtained of each of 5 movement phases (1st pull, transition, 2nd pull, turnover and drop). Descriptive data, intraclass coefficient correlation (ICC) and minimal detectable change (MDC) from each studied variable were obtained and presented.

Results:
Our results indicated low to excellent reliability for studied variables, with the initial phases of the lift (i.e., 1st pull, transition and 2nd pull) displaying better reliability, while the latter phases of the movement (turnover and drop) exhibited poorer reliability for the majority of variables.

Conclusions:
The presented data, with a wide description of normative data obtained from the power snatch of recreational weightlifters could help coaches to evaluate power snatch performance as a conditioning tool for recreational athletes.

eISSN:2391-436X
ISSN:2299-9590
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