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Proper Treadmill Size | Livestrong.com You also need to check the motor's revolutions per minute rating. If you're a walker, you can get by with 1.5 CHP at less than 5,000 RPM. If you're going to run on the treadmill, you need at least 2.5 CHP at less than 4,000 RPM. And, if you weigh more than … How much of an incline should you use on a treadmill? - 3G ... · Step it up. Once you’re really comfortable on the treadmill and have achieved a basic fitness level to regularly walk for 20-30 minutes at a time, you…