- 著者
- 藤田 英二 竹中 健太郎 下川 美佳 與谷 謙吾 小澤 雄二 中村 勇 小崎 亮輔 前阪 茂樹
- 出版者
- 日本武道学会
- 雑誌
- 武道学研究 (ISSN:02879700)
- 巻号頁・発行日
- vol.56, no.1, pp.19-27, 2023 (Released:2023-11-14)
- 参考文献数
- 26
This study investigated the effects of full-force bicycle pedaling exercise on deep body temperature and exerted power while wearing kendo-gu with a mask and face shield in a hot and humid environment. The subjects were eight male university kendo athletes. All subjects wore kendo-gi and kendo-gu but the experiments were conducted under two conditions: one with the subjects wearing a mask and face shield and the other without a mask and face shield. The experiments were conducted in a climate chamber with the WBGT (wet bulb globe temperature) set at 28. Intermittent, full-force pedaling exercises using a bicycle ergometer with a 15-minute rest period in between exercises. Changes in core body temperature during rest and the rate of decrease in exerted power during the two full-force pedaling exercises were examined. The results showed that wearing a mask and face shield caused an increase in deep body temperature during the resting period between exercises, and a decrease in exerted power during the post-rest exercise. These results suggest that wearing masks and face shields in a hot and humid environment in kendo training may increase the risk of heat stroke and affects the quality of training.
3 0 0 0 IR 筋運動感覚残効を伴う重い木刀での素振りが剣道の打突パフォーマンスに与える影響
- 著者
- 與谷 謙吾 泉富葵 前阪 茂樹
- 出版者
- 鹿屋体育大学
- 雑誌
- 学術研究紀要 / 鹿屋体育大学
- 巻号頁・発行日
- no.55, pp.67-73, 2017-08-01
2 0 0 0 OA 竹刀を用いた光刺激に対する引き技動作の筋電図反応時間及び打撃動作時間の分析
- 著者
- 與谷 謙吾 今泉 英徳 桐本 光 北田 耕司 田巻 弘之 荻田 太 竹倉 宏明
- 出版者
- 日本生理人類学会
- 雑誌
- 日本生理人類学会誌 (ISSN:13423215)
- 巻号頁・発行日
- vol.12, no.3, pp.139-146, 2007
- 参考文献数
- 30
- 被引用文献数
- 1
Visual stimulation-reaction time and subsequent strike time in the sport of kendo were assessed using electromyographic (EMG) reaction time. Fourteen male college students (kendo athletes (n=7), non-kendo athletes (n=7)) were asked to perform a kendo strikes in response to visual stimulation from a flashing light signal. The strikes employed, the Hiki-Men (HM) and Hiki-Kote (HK), were performed using a bamboo sword, or Shinai, using both of the upper limbs as quickly as possible. The EMG signals from the right (R) and left (L) biceps brachii, the R-, and L-triceps brachii, and R-flexor carpi ulnaris muscles were recorded simultaneously together with the elbow joint angle and hitting shock signals. Total task time (TTT), pre-motor time (PMT), motor time (MT), and action time (AT) were measured for the HM and HK tasks. The photo stimulation body reaction time (BRT) was also measured. Significant strong positive correlations were observed between PMT and TTT for both HM and HK tasks (p<0.01, r=0.93-0.94). Multiple regression analysis was used to determine the contribution of each component of the model in TTT. The standardized partial regression coefficient (β) was significant (P<0.01) for MT (β=0.36-0.38), AT (β=0.49-0.56) and was highest for PMT (β=0.79-0.80). The individual time ratio for PMT, MT and AT to TTT was approximately 50%, 20% and 30%, respectively. No significant correlations were observed between BRT and TTT for the HM and HK tasks (r=-0.02, 0.16). These results suggest that PMT is the most important component contributing to the TTT, and that BRT is not correlated to the TTT in kendo strikes.