True-fitness Z9 Bedienungsanleitung PDF herunterladen (Seite 91)

appendIx c - Mets explanatIon and forMulas

Z 8 a n d Z 9 S e r i e s Tr e a d m i l l O w n e r ' s G u i d e

As stated earlier, the MET is a unit of exercise measurement that

takes into account body weight. Since energy expenditure in a

weight-bearing exercise such as running, walking, or stairclimbing is

directly proportional to body weight, the formulas to calculate METs

are a bit simpler than for, say, an exercise bike. For example, 7 mph

running is always 11.7 METs, no matter who you are.

A MET is defined as 3.5 ml/min/kg of oxygen usage by the body,

where:

ml is milliliters, the actual measured volume of gaseous oxygen

min is minutes

kg is bodyweight in kilograms

This energy consumption rate corresponds to about 72 calories per

hour for a 150-pound person, which approximates the average basal

metabolic rate of the general population.

The best formulas for treadmill energy expenditure also use oxygen

usage by the body, or VO2. The two formulas are:

walking VO2 = (2.68 * speed) + (0.48 * speed * incline) + 3.5

running VO2 = (5.36 * speed) + (0.24 * speed * incline) + 3.5

To get METs, divide the result by 3.5.

(Noted exercise physiologist David Costill's speed constants for

walking and running are 3.06 and 4.86, respectively.)

Mets

xplanatIon

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orMulas

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True-fitness Z9 Bedienungsanleitung Seite 91