Appendix C
Z 8 . 1 e E l l i p t i c a l O w n e r ’ s G u i d e
155
As you ride the Z8.1e Elliptical, your exercise intensity is best
measured as the amount of power received by the elliptical
from your pedaling. This power is usually expressed in watts.
The watts measurement is calculated from your pedaling
speed (called
cadence
) multiplied by the amount of resistance
on the pedals (called
torque
). (See Feynman,
Lectures on
Physics
, 1971.)
In most cases it is desirable to keep the exercise intensity
constant, no matter what the pedal cadence, since it allows
accurate control of the rider's workout. This kind of workload
control is called
constant power
. If you pedal faster, the
resistance on the pedals (torque) is reduced by the same
amount. If you pedal slower, the resistance is increased.
If, instead, the amount of resistance on the pedals stays the
same when your cadence changes, your workload intensity will
vary directly with your cadence. If you pedal twice as fast,
your exercise intensity doubles. This kind of workload control
is called
constant torque
.
Constant power is used by the Z8.1e Elliptical in most cases,
in order to provide the most accurate workload control. This
is especially important in heart rate control workouts and the
Calorie Goal program.
A negative side-effect of constant power is that at very low
cadences, such as below 55 rpm, the amount of extra torque
applied to the pedals to keep power constant is so great that
the rider may not be able to keep the pedals moving. To
reduce this problem, the elliptical changes to constant torque
at cadences below 55 rpm, preventing any further increases in
torque. The computer will also warn you that it is no longer
able to control exercise intensity.
A
PPENDIX
C
C
ONSTANT
P
OWER AND
C
ONSTANT
T
ORQUE
Summary of Contents for Z8.1e
Page 4: ......
Page 6: ......
Page 11: ......
Page 12: ......
Page 14: ......
Page 22: ......
Page 24: ......
Page 35: ......
Page 36: ......
Page 38: ......
Page 41: ......
Page 42: ......
Page 44: ......
Page 48: ......
Page 50: ......
Page 53: ......
Page 54: ......
Page 56: ......
Page 63: ......
Page 64: ......
Page 66: ......
Page 73: ......
Page 74: ......
Page 76: ......
Page 79: ......
Page 80: ......
Page 82: ......
Page 88: ......
Page 90: ......
Page 96: ......
Page 98: ......
Page 100: ......
Page 102: ......
Page 111: ......
Page 112: ......
Page 114: ......
Page 119: ......
Page 120: ......
Page 122: ......
Page 129: ......
Page 130: ......
Page 132: ......
Page 134: ......
Page 136: ......
Page 139: ......
Page 140: ......
Page 142: ......
Page 145: ......
Page 146: ......
Page 148: ......
Page 151: ......
Page 152: ......
Page 154: ......
Page 157: ......
Page 158: ......
Page 160: ......
Page 163: ......
Page 164: ......
Page 165: ...Appendix E Specifications appendix e Z 8 1 e E l l i p t i c a l O w n e r s G u i d e 165...
Page 166: ......
Page 168: ......
Page 170: ......
Page 173: ......