7. This is a motorless tredmill. Increasing
the speed for short periods of time, gradually,
can be good for the heart.
REFERENCES:
1. The Doctor's Heart Cure, By Al Sears, M.D.,
2004.
2. Doctor Morrison's Miracle Tune-Up For
Rejuvenated Health by Marsh Morrison,
D.C.,Ph.C.,F.I.C.C., 1973.