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appendIx e - glossarY
Z 5 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
Quinton, Schwinn, Stairmaster, Star Trac, Tectrix, and Trotter. See
fitlinxx.com/csafe/.
exercise: the different metabolic state during any activity greater
than rest. More commonly, the voluntary activity undertaken for
health and conditioning reasons.
exercise intensity: a measurement of the extra metabolism above
basal metabolic rate (BMR). Sometimes this measurement includes
BMR, but this is less desirable. This measurement is usually using
standardized formulas for different exercises. Direct measurement
requires oxygen uptake monitoring equipment. Typical units of
measurement are watts, calories per hour, METs, and VO2. Note
that this is not the same as the amount of power being applied to an
external machine, due the body’s efficiency of between 20% and 30%.
exercise, weight-bearing: where the body’s full weight must be
lifted and moved. With exercise equipment, only treadmills and
stairclimbers meet this requirement. (Ellipticals are not true weight-
bearing exercise, although riding style does affect this somewhat.)
The reason weight-bearing exercise is important to distinguish
from non-weight-bearing exercise is because in the former, calorie
consumption varies directly with body weight, whereas in the latter
(which includes exercise bikes) body weight does not affect calorie
consumption.