Arctic health: Energy requirements

ENERGY REQUIREMENTS IN ARCTIC ENVIRONMENTS

Metabolic equivalents (METS)

A MET is the ratio of the rate of energy expended duting ancactivity to the rate of energy expended during rest

One MET is equal to an oxygen uptake of 3.5 ml / kg / min

Kilocalorie (kcal) is the energy needed to increase the temperature of 1 kg of water by 1°C.

To convert METs to kcal/ min utilise the individual’s weight

kcal/min=[(METsx3.5ml/kg/min x kg) ÷1000)] x 5

METs    Activity

  • 7     Skiing general
  • 8     Skiing  light speed
  • 9     Skiing moderate  speed
  • 14    Skiing vigorous
  • 16    Snow mountaineering
  • 4      Snow mobiling
  • 8      Snowshoeing
  • 8      Rock & mountain climbing
  • 7      Climbing hills 0-9 pounds
  • 8      Climbing  hills 21-42 pounds
  • 9      Climbing hills> 42 pounds
  • 6      Shoveling snow
  • 8      Shovelling digging trenches
  • 9       Shovelling heavy (more than 16 pounds per minute

Hill climbing  (@ 7 METs) for 30 minutes on 3 days per week for 70 kg male:

7 METs x 30 min x 3 times per week = 630 MET-minutes per week

[(7 METs x 3.5 ml/kg/ min x 70kg) ÷ 1000)] x 5 = 8.575 kcal/min

8.575 kcal/min x 30 min x 3 times / week = 771.75 kcal/ week