What Determines the Weight Limit on a Treadmill?

Selecting and using a treadmill requires research and knowledge. Different treadmills offer different components, from speed and incline settings to pre-set programs. None of these options are effective, however, if the machine won't support your weight. Pay attention to the weight capacity limits before you use a treadmill so you do not crack the deck or burn the motor.

  1. Max It Out

    • Treadmills have maximum weight limits. The most common limit is 300 pounds. Commercial treadmills often have higher weight capacities such as 350 pounds; some can be found with up to 500-pound weight limits. The higher weight limit usually correlates to a more expensive treadmill because the frame, deck and motor are a higher quality.

    Motor Up

    • An electric treadmill is powered by a motor. Typically, treadmill motors are between 1.5 and 3.0 horsepower. A treadmill with a 1.5 motor supports a maximum weight of 150 pounds. Those weighing over 275 pounds should select a treadmill with a 2.0 or higher horsepower motor. If you use a treadmill with a motor that does not support your weight, you risk burning out the motor quickly.

    Deck It Out

    • A treadmill deck is the flat portion that the belt glides over. It supports the rollers so the belt moves freely. Decks are made of wood and can be thin or thick. A thicker deck supports more weight. When you see treadmill weight capacities that are lighter, the deck is thinner. A deck should flex when you use it, but not too much. If you exceed the weight limits, you may crack the deck. If you are unable to find a treadmill's specifications, look for a wider deck and a longer belt to support a higher weight.

    Frame It Up

    • The frame of a treadmill also determines how much weight the machine supports. Some frames are made of steel and others of aluminum. The metals are either bolted or welded together. The material and the construction determine the weight limit of the treadmill. A higher quality frame is needed when the treadmill is used frequently by a heavier person who does more running than walking.