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Muscle Activation Profiles of Lower Extremities in Different Throwing Techniques and in Jumping Performance in Elite and Novice Greek Judo Athletes

100%
Zaggelidis G., Lazaridis S.
Journal of Human Kinetics
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2013
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vol. 37
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issue 1
63-70
EN
The aim of this study was to examine the neuromuscular adaptations of knee muscles during hip throwing techniques and vertical jumps in elite and novice Greek judokas. Ten elite and ten novice judokas performed two hip throws and different vertical jumping tasks. Surface electromyograms were recorded from vastus lateralis and biceps femoris muscles along with generated kinetics. Elite judokas revealed higher EMG activity of agonist muscles during throws and jumps but lower co-activation levels. Better jumping performance, better utilisation of the stretch-shortening cycle mechanism, higher and earlier generated pushoff forces and shorter contact time periods characterized elite judokas. Total neuromuscular activation that adopt elite judokas reveals a more mature and skill dependent strategy compared to novice ones.
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The Effect of Different Types of Warm-Up Protocols on the Range of Motion and on Motor Abilities of Rhythmic Gymnastics Athletes and Ballet Dancers

81%
Zaggelidou E., Malkogeorgos A., Zaggelidis G., Galazoulas C.
Central European Journal of Sport Sciences and Medicine
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2023
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vol. 42
31-44
EN
The aim of this study was to examine the short-term effects of different types of warming up on the range of motion and on motor abilities of rhythmic gymnasts and ballet athletes. Twenty-five athletes participated in this study (11 ballet dancers and 14 rhythmic gymnasts), aged 14,72±1,43. All participants followed an intervention consisting of two warm-up protocols, one with static stretching exercises and the other with dynamic warm up protocol. The two protocols were implemented on two different days for one week. Range of motion (ROM) and hop test measurements were carried out before and after each warm-up session. For the statistical analysis, non-parametric (Wilcoxon) tests and Friedman test were used, and the level of significance was set at p < 0.05. The results showed that both warm-ups had positive effects on ROM and on motor abilities. After applying both protocols, significant differences were observed in all joints. In conclusion, both types of warm-up routines resulted in almost the same level of improvement in ROM and motor abilities; however, it was observed that after the dynamic warm up there was a slightly increased improvement in motor abilities, but it was not statistically significant.
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