上一篇用字錯誤,造成混亂,非常抱歉。今篇特設釐清因為用字錯誤所做成的概念困擾和錯誤。753Please respect copyright.PENANA4VRhq0NBKm
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上一篇提及身體消耗的卡路里是與步行總距離有關,其正確用字應為跑步總距離,非步行總距離。753Please respect copyright.PENANASv1WVDMmur
753Please respect copyright.PENANAWHnBsrvDhY
最終所得出的公式應為每1kg跑步1km就會消耗1卡路里,而非每1kg步行1km就會消耗1卡路里。753Please respect copyright.PENANAXRV8IxYgGQ
753Please respect copyright.PENANAr0LrWi9mlK
(圖2)之於公式為每1kg跑步1km就會消耗1卡路里,究竟是如何得出來的呢?753Please respect copyright.PENANArOYO0SNOqs
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這是根據跑者真實實驗數據所得,跑速越快的話,能量消耗亦會越大,而且兩者的關係亦成直線相關趨勢。753Please respect copyright.PENANA0cfrdlSA2D
753Please respect copyright.PENANA49Dxj49tap
如果我們將Y-axis的單位同X-axis的單位相除,就可以推算出一個kcal/kg/km的常數(constant)。753Please respect copyright.PENANA0NeUKTl3bk
753Please respect copyright.PENANAzeMMjh9iRJ
(圖3)上一篇因錯誤用字的關係,做成了假設體重一樣,跑步1km與行路1km消耗的卡路里均會一樣的假象,這裡特別在這方面略微深入講解一下。753Please respect copyright.PENANA90Y7Go9WpM
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每1kg每1km就會消耗1卡路里,只適用於跑步之上。753Please respect copyright.PENANA7AbNsK9RA5
753Please respect copyright.PENANAqY6wGj06K2
從左面的圖中得知,當步速高過10km/hr的時候,能量消耗與步速才會成直線相關趨勢,每1kg每1km就會消耗1卡路里才可套用。753Please respect copyright.PENANAq5hjhCLQId
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而步速低過10km/hr的時候,能量消耗與步速再也不成直線相關趨勢,每1kg每1km就會消耗1卡路里的定律亦唔能夠得以套用。753Please respect copyright.PENANAf9Pe7Oz2QG
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雖然香港人節奏急速,但以10km/hr的速度「行路」就應該不會太可行。753Please respect copyright.PENANA4TzA8PdLF8
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(圖3)究竟身體能夠提供得到幾多卡路里予運動上?753Please respect copyright.PENANA2dw6rAEZEW
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如圖中所見,駭眼數字好足夠應付馬拉松的卡路里消耗,那麼為何這麼多人中途會無法支持下去呢?753Please respect copyright.PENANA8YpJKZHCym
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好大部份的原因,均歸咎於名為HIT THE WALL的現象,下篇再續。753Please respect copyright.PENANApbf4KjNZvV
753Please respect copyright.PENANASpMVDQxAbb
如果想我快啲出文的話,請入去Penana網站科普專欄–薯不揀單俾一個like以及Bookmark,這對我非常之重要。753Please respect copyright.PENANAjGPbH4Dg3P
753Please respect copyright.PENANAzGmRY5pBxI
Link: https://www.penana.com/story/66244/%E7%A7%91%E6%99%AE%E5%B0%88%E6%AC%84-%E8%96%AF%E4%B8%8D%E6%8F%80%E5%96%AE/toc753Please respect copyright.PENANAWq98GqLWSv
753Please respect copyright.PENANAJdzhHixwWe
同時亦可以在Penana網站裡按「買一嚿/半嚿薯仔」,以課金的方式推動我繼續搜羅資料寫文,多謝。753Please respect copyright.PENANAfd7KiAKbG2
753Please respect copyright.PENANAzZqibfwdwv
Link:753Please respect copyright.PENANANaArv4IomR
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio753Please respect copyright.PENANAQDtQHKjnkn
753Please respect copyright.PENANAAsQeoJorC8
753Please respect copyright.PENANAD9VlrQ6l7d
有興趣接收科學資訊的話,歡迎follow IG: potatopigtongue。753Please respect copyright.PENANAygaUbikkYV
https://www.instagram.com/potatopigtongue/753Please respect copyright.PENANAE0YANwWS4s
753Please respect copyright.PENANAyF5HPOHrb3
Ref1:https://journals.physiology.org/doi/abs/10.1152/jappl.1963.18.2.367753Please respect copyright.PENANASAWO7cKSOz
Ref2:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1859586/753Please respect copyright.PENANAvFdRSeEuMA
Ref3:https://www.nature.com/articles/s42255-020-0251-4753Please respect copyright.PENANATgRa9zKN1t
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科普專欄–薯不揀單
Author:
薯仔聞茱莉
ISSUE #85
深入淺出–點解瘦削運動員都能夠跑畢馬拉松全程?(2)
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