Ulfario Walking Pad treadmill, $112.50/$89.99 at Amazon.com

WaterRower GX Studio rowing machine, $795 at Global Fitness

Original rower in walnut, $1,699 at WaterRower

Power Plate Power Plate REV bike, $5,995 at Carbon Wellness MD

NordicTrack T Series treadmill, $1,299/$999 at Amazon.com

Hydrow Origin rowing machine, $2,195 at Amazon.com