A manual treadmill is a fitness machine that moves only when you move. According to the owner’s manual for the Assault Fitness AirRunner, this type of treadmill is non-motorized, meaning the user initiates and controls the speed of the running belt entirely through their own effort. It can be used for walking or running, and because it has no motor, it does not need to be plugged into a wall outlet.
How a manual treadmill works
The AirRunner manual explains that the running belt moves freely in only one direction. There is no motor to drive the belt, and there is no emergency stop feature. Instead, the treadmill slows to a stop on its own when the user stops moving. This design means the user must always grasp the handrails when mounting and dismounting, and should never attempt to get on or off while the belt is moving. The manual also warns never to jump onto or off the treadmill, and never to enter from the front. The running surface is not intended for cleats or running spikes.
Because the treadmill is self-powered, the console runs on four AA alkaline batteries. The machine itself weighs 280 lbs (127 kg) and has a running area of 17.1 by 62.2 inches (435 by 1,580 mm). The step-on height is 13.45 inches (340 mm), and the maximum user weight is 350 lbs (158.8 kg). These specifications come directly from the AirRunner manual and may differ on other models.
Manual vs. motorized treadmills
Motorized treadmills, such as the Spirit CT800 and the Philips ReActiv Treadmill 4.0 T, operate very differently. Their owner’s manuals state that these machines must be connected to a properly grounded outlet and should never be used with a ground fault circuit interrupter (GFCI) outlet. The Spirit CT800 manual specifies a dedicated 15-amp circuit, while the Philips manual calls for a dedicated 20-amp circuit. Manual treadmills avoid these electrical requirements entirely because they have no drive motor.
Another key difference is stopping. Motorized treadmills include a safety key or tether cord that, when pulled, stops the belt. The Philips manual describes a magnetic safety tether cord that must be in place for the treadmill to start, and pulling it stops the treadbelt. Manual treadmills lack this feature; the user controls speed and stopping by their own movement. The AirRunner manual emphasizes that the belt will slow to a stop on its own, so the user must remain in control at all times.
Clearance recommendations also vary. The Spirit CT800 and Philips manuals both specify a minimum of 0.5 meters (19.7 inches) on each side and 1 meter (39 inches) behind the treadmill. The AirRunner manual, however, recommends 0.5 meters to the left, right, and front, and 2.0 meters (79 inches) behind the machine. Always follow the spacing guidelines in your own treadmill’s manual.
Safety and proper use
All three manuals stress the importance of consulting a physician before starting any exercise program. The AirRunner manual specifically advises a thorough medical exam if you have high blood pressure, high cholesterol, diabetes, chronic respiratory illness, heart disease, are pregnant, have a family history of these conditions, are over age 45, smoke, are obese, have not exercised regularly in the past year, have other chronic illnesses or physical impairments, or are taking any medication. The Spirit CT800 and Philips manuals similarly state that a physician should be consulted, especially for persons over 35 or with pre-existing health conditions.
When using a manual treadmill, always hold the handrails while getting on and off. The AirRunner manual warns never to enter the treadmill from the front. Never allow children to use or be near the equipment unsupervised. The AirRunner manual says children under 16 should not use the treadmill, while the Spirit CT800 and Philips manuals say children under 13 should be kept away or supervised. Keep pets away as well. The U.S. Consumer Product Safety Commission also recommends checking for recalls at cpsc.gov/recalls and reporting any safety incidents at SaferProducts.gov.
Heart rate monitors on these machines are not medical devices. The AirRunner manual notes that various factors can affect accuracy, and the readings are intended only as exercise aids for tracking general trends.
Maintenance and care
The AirRunner manual provides a detailed maintenance schedule. After each workout, wipe down all surfaces with a mild soap solution and dry thoroughly. Perspiration is corrosive and can cause discoloration, rust, and odors if left on the machine. Do not use abrasive cleaners or coarse brushes.
On a monthly basis, inspect the unit for noisy, damaged, or loose components. Ensure the treadmill does not rock; adjust the leveling feet if needed. Check all hardware, including uprights, handrail, frame, and plastic covers. Lubricate the twelve running belt guide pulleys with one drop of silicone-based lubricant per pulley. Move the treadmill and clean or vacuum any dust, lint, or debris that has collected under the belt and frame. The console will display a monthly service reminder icon; once the service is done, the icon can be reset in the settings mode.
If you notice unusual noise, scraping, knocking, grinding, or vibration, discontinue use immediately and contact an authorized service technician. The manual warns that ignoring a minor issue can lead to a major repair. Maintenance instructions vary by model, so always follow the guidance in your own treadmill’s manual. For more general care tips, see our treadmill maintenance section and the article on lubrication.
Frequently asked questions
Can I run on a manual treadmill?
Yes. The AirRunner manual states that the treadmill may be used for running or walking. Because the belt is user-powered, running requires more effort to start and maintain speed compared to a motorized treadmill.
Do manual treadmills need electricity?
No. The AirRunner is non-motorized and the console runs on four AA batteries. You do not need to plug it into a wall outlet, and there are no electrical circuit requirements.
How do I stop a manual treadmill?
The belt slows to a stop on its own when you stop moving. There is no emergency stop button. Always hold the handrails when mounting and dismounting, and never jump off while the belt is moving.
For more on manual treadmills and how they compare to other types, visit our Manual Treadmills category page, explore the broader treadmill types section, or read our comparison of walking pads and treadmills.
