歩行路の傾斜，歩行速度，および担荷重量との関連からみた登山時の生理的負担度の体系的な評価～トレッドミルでのシミュレーション歩行による検討～

• 萩原 正大

  鹿屋体育大学大学院体育学研究科博士後期課程

• 山本 正嘉

  鹿屋体育大学スポーツトレーニング教育研究センター

書誌事項

タイトル別名

• SYSTEMATIC EVALUATION OF THE PHYSIOLOGICAL LOAD OF MOUNTAIN CLIMBING FROM THE RELATION BETWEEN INCLINATION OF WALKING PATH, WALKING SPEED, AND BACKPACK WEIGHT; SIMULATION USING WALKING ON A TREADMILL
• ホコウロ ノ ケイシャ ホコウ ソクド オヨビ タンカジュウリョウ ト ノ カンレン カラ ミタ トザンジ ノ セイリテキ フタンド ノ タイケイテキ ナ ヒョウカ トレッドミル デ ノ シミュレーション ホコウ ニ ヨル ケントウ
• Systematic evaluation of the physiological load of mountain climbing from the relation between inclination of walking path, walking speed, and backpack weight: simulation using walking on a treadmill (in Japanese)

抄録

We simulated mountain climbing using walking on a treadmill in order to systematically evaluate the physical load during mountain climbing. The conditions of three types of load-(1) inclination of the walking path (walking uphill and downhill), (2) walking speed, and (3) backpack weight-were varied within the range assumed for normal mountain climbing (40 sets of conditions in total). When the three types of load were expressed as vertical work rate, energy expenditure (VO₂) during walking uphill and downhill was distributed along roughly the same curve. The following characteristics of walking uphill and downhill were observed.<br>A. Walking uphill<br>For all three types of load, increase in load gave a linear increase in VO₂ and heart rate (HR). A lactate threshold (LT) appeared at an intensity of 62%VO_2max, when HR was 78% HR_max. Rating of perceived exertion (RPE) was evaluated for the “Breathlessness” and “Leg Fatigue”, and both of these increased roughly in proportion to %VO_2max.<br>B. Walking downhill<br>When walking downhill, VO₂ was 35-50% the intensity of VO₂ when walking uphill on the same slope and at the same speed. Energy expenditure did not exceed 60%VO_2max in any of the load conditions, and no LT was seen. RPE values were higher for walking downhill than walking uphill, even when %VO_2max values were the same. RPE values for the “Leg Fatigue” tended to be higher than for the “Breathlessness” at the same speed in downhill walking.<br>Using these data, we created a table giving the intensity of exercise of mountain climbing expressed as VO₂ per unit body mass and metabolic equivalents (Mets) with vertical migration velocity and total weight (Body weight + Backpack weight) as variables. This table gives mountain climbers a systematic understanding of the physical load under various mountain climbing conditions. It is likely to be of use as a reference for mountain climbers of different levels of physical fitness when practicing mountain climbing appropriate to their individual level. The present results suggest that in downhill walking, it is insufficient to express the physical load in energy expenditure (VO₂ and Mets) alone, and the load on the leg muscles must also be judged using the RPE in the “Leg Fatigue”.

収録刊行物

• 体力科学

  体力科学 60 (3), 327-341, 2011

  一般社団法人日本体力医学会

キーワード

• mountaineering
• walking
• Mets
• energy expenditure
• negative work

詳細情報

• CRID: 1390282679898192256
• NII論文ID: 10029136355
• NII書誌ID: AN00137986
• DOI: 10.7600/jspfsm.60.327
• ISSN: 18814751
• ISSN: 0039906X
• NDL書誌ID: 11162694
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I11162694
• Web Site: https://www.jstage.jst.go.jp/article/jspfsm/60/3/60_3_327/_pdf
• Web Site: https://search.jamas.or.jp/link/ui/2012061244
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可