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RISS 인기검색어
- 검색키워드
- 저자 : ( Jennifer Ann Clarke ) (검색결과 2 건)
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( Jennifer Ann Clarke ),( Hyun-chul Jung ),( Hyo-jung Kang ),( Myong-won Seo ),( Jong-kook Song ) 국제태권도학회 2016 Journal of the International Association for Taekw Vol.3 No.2
This study examined the long-term effects of Taekwondo training on bone mineral density (BMD), body composition, and physical fitness in middle-aged men. Thirty men (43 ± 2 yr) were divided into three groups based on Taekwondo experience and current training volume. The currently practicing Taekwondo group (TKDC: n = 10, training career: 34.1 yr) practiced Taekwondo ≥ 2 times per week. The former Taekwondo group (TKDS: n = 10, training career: 19.2 yr) trained during childhood and adolescence, but ceased training before age 30. The control group (CON: n = 10) received no regular physical training during youth. The results showed that both Taekwondo groups had a significantly higher BMD, (p < 0.004) and Z-scores (p < 0.008) for femoral neck and L4 BMD (p < 0.023). For physical fitness, both groups showed significantly better results for 50m shuttle run (p < 0.001) and sit-ups (p < 0.0004) than the control group. No significant difference was found in body composition among the groups. In conclusion, TKDC and TKDS may have had site-specific benefits for BMD. As there was no significant difference in these variables between the two Taekwondo groups, the benefits were most likely gained during childhood and adolescence, and further training did not appear to increase these gains. More research is needed with a larger sample size to confirm these findings.
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( Jong-kook Song ),( Duk-jae Han ),( Hyun-chul Jung ),( Hyo-jung Kang ),( Myong-won Seo ),( Jennifer Ann Clarke ),( Hyun-bae Kim ) 국제태권도학회 2015 Journal of the International Association for Taekw Vol.2 No.1
The aim of this study was to examine the effects of a 6-week pre-season Taekwondo training program on body composition, physical fitness, and isokinetic muscular strength in female athletes. Twenty-two collegiate female athletes with mean ages ranging from 18.8 to 19.4 years participated. They were divided into four groups according to their weight categories: G1 (≤49 kg), G2 (>49 kg-57 kg), G3 (>57-67 kg), and G4 (>67 kg). The training program included 3 sessions a day, 3 days a week for 6 weeks. Body composition parameters were measured by Dual X-Ray Absorptiometry (DXA). Physical fitness tests including sit and reach, grip strength, sit-ups, standing long jump, 50 m shuttle run, and 20 m multi-stage endurance shuttle run were applied. Isokinetic strength was measured by an isokinetic dynamometer. The extensors and flexors of the knee and trunk were tested at three fixed angular velocities (60°·s<sup>-1</sup>, 120°·s<sup>-1</sup>, and 240°·s<sup>-1</sup>). Significant time x group interaction effects were found for fat tissue (p < 0.05). G4 demonstrated significant decreases in fat tissue (p < 0.01) and percent body fat (p < 0.05) after the training program. However, no significant changes were found for body mass, lean tissue, and bone mineral density in all groups. G1 demonstrated significant improvements on the 50 m shuttle run (p < 0.001) and the multistage endurance run (p < 0.001), while G2 showed significant changes for grip strength (p < 0.01), the 50 m shuttle run (p < 0.01), and the multistage endurance run (p < 0.05). G1 demonstrated significant improvement in left extension (p < 0.0001) and left flexion (p < 0.05) at 60°·s<sup>-1</sup>, left flexion (p < 0.001) at 120°·s<sup>-1</sup>, and all variables at 240°·s<sup>-1</sup>. Significant changes were also found in G2 (left and right extension at 60°·s-1 and 120°·s<sup>-1</sup>; right and left flexion at 240°·s<sup>-1</sup>), and in G3 (left extension at 60°·s<sup>-1</sup>, 120°·s<sup>-1</sup>, and 240°·s<sup>-1</sup>). However, the training had no effect on trunk isokinetic strength in all groups. In conclusion, this study suggests that a pre-season training program may decrease body fat, while improving agility, endurance, and knee muscular strength in specific weight categories of female Taekwondo athletes. However, this specific type of training should not be considered as an alternative training method for trunk strength in female athletes.
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