Comparative 3-dimensional kinematic analysis of snatch technique between top-elite and sub-elite male weightlifters in 69-kg category
Absztrakt:
Objective: The purpose of this study was to determine the
differences in technical characteristics between top-elite and
sub-elite male weightlifters performing the snatch style in
the 69-kg category. The obtained results can provide valuable
information for lower level lifters and coaches to achieve
better competition performance by altering their training
methods accordingly.
Methods: Six top-elite and six sub-elite weightlifters
participated in this study. The heaviest successful snatch
lift from the three attempts of each subject was analyzed. The
video data were recorded under competition conditions at China
National Weightlifting Championship and China Olympic Trial,
which were analyzed by SIMI°Motion7.50 3D analysis system.
Results: The results showed that the maximum vertical- and
relative vertical height (normalized by athletes' height) of
the barbell, the maximal vertical linear velocity and
acceleration of the barbell were significantly greater in top-
elite lifters (p < 0.05). In addition, the flexion angles of
the knee joint were significantly greater in top-elite lifters
during the first phase and the third phase of the snatch lift.
Sub-elite lifters showed less flexion and significantly slower
angular velocity in knee joint than top-elite lifters during
the second phase of the snatch lift (p < 0.05).
Conclusion: The findings of the present study demonstrated the
differences in technical characteristics between the two
levels. According to these findings, coaches of sub-elite
lifters should focus on exercises suitable to the strength
characteristics of the first and the third phase of the snatch
lift. In addition, the flexor muscles of knee joint among the
sub-elite lifters should be strengthened and the ability of
generating and utilizing elastic energy during the second
phase of the snatch lift should be improved.
A tételhez tartozó fájlok
