The only exercise equipment
presently being flown is a treadmill. The exact stowage location
in the crew compartment middeck for launch, orbit and entry depends
on the mission.
The treadmill is used with a restraint system to allow a crew member
to run or jog in orbit. The treadmill kit is stowed on top of the
treadmill and contains the waist belt, two shoulder straps, four
extender hooks and a physiological monitor. The treadmill kit is
restrained by four force cords that are used to restrain the body
during exercise. The treadmill attaches to four middeck quick disconnects.
The quick disconnects contain several metal hooks that are hinged
within the quick disconnect and actuated by the knurled lock ring.
To release the quick disconnects, the lock push button is depressed
and the knurled lock ring is pushed up, releasing the metal hooks.
When the lock ring is pushed down, the metal hooks converge and
capture the top of the middeck stud.
The treadmill has a speed control knob, which controls a rapid
onset braking system. When the preset speed is reached, the brake
engages and produces increased drag on the running track.
The physiological monitor provides heart rate, the time run and
the distance run. The heart rate is determined by an ear clip, which
has an infrared sensor that detects increased blood flow (pulses)
in the ear lobe. Distance run is determined by connecting a mechanical
sensor wire on the side of the treadmill to the physiological monitor.
The mechanical sensor detects the number of revolutions of the track
and sends an electrical signal to the physiological monitor, where
the distance is computed and shown on the display along with the
heart rate. The monitor is stowed on the treadmill handle while
the crew member runs.