Yes. Exceeding 275 lbs will cause the motor controller to overcurrent trip (E2 error). The frame and deck are also rated for that limit. Overloading leads to cracked welds, which are not covered under warranty.
Handheld pulse sensors are usually integrated into the side handlebars for heart rate tracking. Safety Features: xterra xt900 treadmill manual
Typically starts at 0.5 or 0.6 mph and can be adjusted in 0.1 mph increments. Console & Operation xterra xt900 treadmill manual
A short story about the journey of an Xterra XT900 manual. The manual for the Xterra XT900 treadmill xterra xt900 treadmill manual