Precor Low-Impact Threadmill M9.57 - Manual (Page 13)

Owner’s Manual: Treadmill Safety Features 11
Weight Limit
You should not allow runners over 350 lb. (160 kg) or
walkers heavier than 500 lb. (225 kg) on the treadmill.
Location
It is important to keep the area around the treadmill open and
free from encumbrances such as other equipment. The
minimum space requirement needed for user safety and
proper maintenance is three feet wide by six feet deep
(one meter wide by two meters deep), directly behind the
running belt.