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。358Please respect copyright.PENANAeXWcm6x7nc358Please respect copyright.PENANApjZ3rmv1IE
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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。358Please respect copyright.PENANA1t3SVm1R2U
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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。358Please respect copyright.PENANAwm97N8X1Jc
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(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?358Please respect copyright.PENANAiCQRLPArE0358Please respect copyright.PENANAktYzWw3N1a
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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。358Please respect copyright.PENANAp43rWwYYBc
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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)。358Please respect copyright.PENANAznqVoR3cxb
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(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。358Please respect copyright.PENANAUdY3mcLAoE358Please respect copyright.PENANAulZ6twWHOI
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每1kg每1km就會消耗1卡路里,只適用於跑步之上。358Please respect copyright.PENANApzBGPeB6aT
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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。358Please respect copyright.PENANAlJ1q4y0oHb
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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。358Please respect copyright.PENANA4SejMULLYV
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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。358Please respect copyright.PENANARfNrz1x3Cd
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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?358Please respect copyright.PENANA6yuABPx5aQ358Please respect copyright.PENANAQHOm3UdAzA
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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?358Please respect copyright.PENANACJU0lYphTB
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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。358Please respect copyright.PENANAA9EeiRttOz
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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。358Please respect copyright.PENANApKoyzezNjQ
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Ref1:https://journals.physiology.org/doi/abs/10.1152/jappl.1963.18.2.367358Please respect copyright.PENANA7ekWMj7GgQ
Ref2:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1859586/358Please respect copyright.PENANAjCXi59sZhb
Ref3:https://www.nature.com/articles/s42255-020-0251-4358Please respect copyright.PENANALG1Wns9DDK