在長時間的運動下,脂肪會為身體帶來能源,支撐身體肌肉所需。馬拉松全程為42.195km,脂肪所提供的能源協助絕對不可或缺。801Please respect copyright.PENANA6zNv7wVYdW
801Please respect copyright.PENANA6NeKbPcyrr
801Please respect copyright.PENANAlZindcqQSR
在這個前題下,為何為數不少的瘦削運動員都可以足夠應付長距離的馬拉松呢?801Please respect copyright.PENANATX1UYJA4zr
801Please respect copyright.PENANALPcx93yadx
801Please respect copyright.PENANAuGrkoeVOLE
(圖2)在此,我們嘗試一下利用數學角度,以卡路里的消耗量探討這一個問題。801Please respect copyright.PENANAWCrcA3xdzC
801Please respect copyright.PENANA0V6O9ZWTkJ
801Please respect copyright.PENANA0uohU8cWNR
有研究確認(Ref1,2),身體消耗的卡路里是與行走總距離有關,而非行走速度。801Please respect copyright.PENANAKFm13xTs5D
801Please respect copyright.PENANAPfg37VNsV0
他們最終得出的公式為每1kg行走1km平地就會消耗1卡路里。801Please respect copyright.PENANADALbVwjM5l
801Please respect copyright.PENANAvSnMFNSHwC
如果我們假設1個70kg的男人跑一場馬拉松,所消耗的總卡路里就會為801Please respect copyright.PENANAxoBhnakPdT
801Please respect copyright.PENANAM56b8dKUod
70kg x 42.195km=801Please respect copyright.PENANAI1g9C7vKRG
2950kcal801Please respect copyright.PENANA8BddJIu2LQ
801Please respect copyright.PENANAsBNbgCRkWI
801Please respect copyright.PENANAHvJqnZ1dA0
(圖3)身體的脂肪每克約可以提供9kcal,如果我們用上最極端的例子,負責儲存能源的體脂只佔身體重量2% (正常為10-32%)的話,所提供得到的能源就會是801Please respect copyright.PENANAAya4qrVitI
801Please respect copyright.PENANAg2Jirm0Fab
70kg x 1000 x 2% x 9801Please respect copyright.PENANAILVRiRuYiQ
=12600 kcal801Please respect copyright.PENANA8vzvmrJx4U
801Please respect copyright.PENANAm01zwU2ja0
801Please respect copyright.PENANAoH79xPbI4h
而基於每場馬拉松所消耗的卡路里僅為2950kcal關係,12600/2950 = 4.27,單憑身體脂肪所提供的能源,就足以應付4場馬拉松!801Please respect copyright.PENANAj0idw2G2lF
801Please respect copyright.PENANAZB70VIoVJG
這個跑4次馬拉松的結果是以極低(儲存能量用的體脂2%)這個極端例子作計算,可以推算得到正常人的話絕對是遊刃有餘跑1場馬拉松;801Please respect copyright.PENANAbEW7n3AKNu
801Please respect copyright.PENANAn33mSgdBmz
此計算方式是假設整場馬拉松是平地鋪設,沒有高低鈄坡。801Please respect copyright.PENANAVfX219ltCF
801Please respect copyright.PENANAQUtw7uFYrv
(圖4)不過,魔鬼在細節,這集反應熱烈的話,下一集將會探討這個計算方式的漏洞以及馬拉松選手經常會遇到所謂Hit The Wall的問題。801Please respect copyright.PENANAkoPI9THFFB
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801Please respect copyright.PENANAoh9IzTnKT2
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。801Please respect copyright.PENANAFOwh2awZmG
801Please respect copyright.PENANAM2uU5bvv0W
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/toc801Please respect copyright.PENANAl0n44yttzJ
801Please respect copyright.PENANAyhTvGmUlRM
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。801Please respect copyright.PENANACeUCDXffq7
801Please respect copyright.PENANAlLMNEH2abr
Link:801Please respect copyright.PENANAJGGLTQucJb
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio801Please respect copyright.PENANA2yMsFIQuxV
801Please respect copyright.PENANAhwVtgPoaT2
801Please respect copyright.PENANA5u9kivE1mU
有興趣接收科學資訊的話,歡迎follow IG: potatopigtongue。801Please respect copyright.PENANATKo31W6GWb
https://www.instagram.com/potatopigtongue/801Please respect copyright.PENANAWtYIPk7Qmi
801Please respect copyright.PENANAHTA25y4Xea
801Please respect copyright.PENANAVTMnWa9tmL
Ref1:https://journals.physiology.org/doi/abs/10.1152/jappl.1963.18.2.367801Please respect copyright.PENANAfD58z4GfsK
Ref2:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1859586/801Please respect copyright.PENANAZGAMHsz0Ac
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科普專欄–薯不揀單
Author:
薯仔聞茱莉
ISSUE #83
深入淺出–點解瘦削運動員都能夠跑畢馬拉松全程?
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