energy and food
バランスダイエットと仮定すると、カロリー比で、炭水化物60 %, タンパク質20%, 脂質20%。各4 kcal/g, 4 kcal/g, and 9 kcal/gなので、乾燥重量1 kgでは4 X ( 600 + 200 ) + 9 X 200=5000 kcal
ハイキングの運動強度を7 Metsとする(Jette, et al. 1990によると、hiking 6, mountaineering 7-8. ) 。
消費エネルギー kcal = METS X hours X body weight、
男 65 kg, 女53 kg、8時間行動と仮定すると
男 7 X 8 X 65 =3640 kcal, 女 7 X 8 X 53 =2968 kcalとなる。 Ludlow et al (2017)により、body weight と backpack weightは等価。
体重の20%のバックパックを持つと、男は3640 X 1.2 =4368 kcal, 女は2968 X 1.2 = 3562 kcal. 一日の必要な食料の重さは5000で割って、各0.87kg と0.71 kg
体重の30%のバックパックを持つと、男は3640 X 1.3 =4732 kcal, 女は2968 X 1.3 = 3858 kcal. 一日の必要な食料の重さは5000で割って、各0.95kg と0.78 kgになる。
Providing the balanced diet, then the proportional calorie is carbohydrate 60%, protein 20%, lipid 20%, therefore, 1 kg of dry food contains 4 X ( 600 + 200 ) + 9 X 200=5000 kcal.
The metabolic equivalents(METS) of hiking may be 7 ( according to Jette, et al. 1990 , hiking is 6, mountaineering is 7-8. )
The energy consumption kcal = METS X hours X body weight
Providing male 65 kg, female 53 kg, 8 hour hiking.
male 7 X 8 X 65 =3640 kcal, female 7 X 8 X 53 =2968 kcal. Based on Ludlow et al (2017), body weight is equivalent to backpack weight.
Then, in the case of 20% of backpack weight. male 3640 X 1.2 =4368 kcal, female 2968 X 1.2 = 3562 kcal. The weight of necessary food is estimated dividing by 5000 kcal. then 0.87kg and 0.71 kg
In case of 30 % of backpack weight, male 3640 X 1.3 =4732 kcal, female 2968 X 1.3 = 3858 kcal. The weight of necessary food is male 0.95kg, female 0.78 kg.
Metabolic equivalents (METS) in exercise testing, exercise prescription, and evaluation of functional capacity.
Jetté M, Sidney K, Blümchen G.
Clin Cardiol. 1990 Aug;13(8):555-65. Review.
J Appl Physiol 2017 Nov 1;123(5):1288-1302. doi: 10.1152/japplphysiol.00504.2017. Epub 2017 Jul 20.
Walking economy is predictably determined by speed, grade, and gravitational load.