Whether you plan to walk, run, or stay active while working at a desk, a treadmill can be a versatile tool. The type of treadmill that fits your life depends on how you intend to use it. This guide explains the key differences and what to look for when choosing a treadmill for walking or running or for under-desk use.

Short version: Walking pads are designed for low-speed desk walking and compact storage. Full-size motorized treadmills support running with higher speeds and sturdier frames. Folding models save floor space. Curved manual treadmills let you control the belt with your own effort. Always follow the manufacturer’s safety and electrical instructions, and keep children away from exercise equipment.

Activity goals for walking and running

According to the CDC’s Physical Activity Guidelines for Adults, adults need at least 150 minutes of moderate-intensity aerobic activity each week, such as brisk walking, or 75 minutes of vigorous-intensity activity like jogging or running, plus muscle-strengthening activities on two or more days. The U.S. Department of Health and Human Services (HHS) Physical Activity Guidelines for Americans, 2nd edition, echoes this and adds that adults should move more and sit less throughout the day, and that some physical activity is better than none. Even short bouts of activity count. The HHS guidelines also note that additional health benefits are gained by engaging in physical activity beyond the equivalent of 300 minutes of moderate-intensity activity a week. A treadmill can help you meet these targets whether you prefer beginner walking plans or running basics.

Walking pads for desk work

An under-desk treadmill, often called a walking pad, is designed for low-speed walking while you work. One example, the UPLIFT Desk inclining walking pad, has a speed range of 0.6 to 4.0 mph and an incline that adjusts from 0 to 10, with a maximum grade of about 7 percent (roughly 4 degrees), according to its instruction manual. The manual states that you need at least 3 feet of clearance behind the walking pad and 1 foot on each side. It must be plugged into a 120V grounded outlet only; do not use adapters or extension cords. The manufacturer advises consulting a physician before starting any exercise program and keeping children and pets away. For maintenance, the manual provides a lubrication schedule: light use (less than 3 hours per week) once a year, medium use (3-5 hours per week) every 6 months, and heavy use (more than 5 hours per week) every 3 months, using only 100% silicone lubricant. The manual also explains how to check belt tension: you should be able to lift the belt about 2 inches from the running board. Always refer to your own walking pad’s manual for specific instructions. For more on these compact machines, see our walking pads overview and desk attachments.

Full-size treadmills for running

If running is your goal, a full-size motorized treadmill offers a larger running surface and a more powerful drive system. One treadmill manual (Spirit CT800) specifies a dedicated 15-amp circuit and warns never to use a ground fault circuit interrupt (GFCI) outlet, as the GFCI may trip frequently. The same manual requires a minimum clearance of 0.5 meters (19.7 inches) on each side and 1 meter (39 inches) behind the machine. It also notes that the treadmill will not power on without the safety key in place, and that children under 13 should be kept away. Maximum user weight for that model is 450 pounds. Other models will have their own limits and requirements, so always follow the instructions that come with your treadmill. For a deeper look at motorized options, visit motorized treadmills and treadmill motors.

Folding treadmills for small spaces

Many treadmills can fold up to save floor space. The ProForm CrossTrainer manual, for example, describes a storage latch that secures the deck in an upright position. That manual also emphasizes using a surge suppressor, avoiding GFCI outlets, and never applying silicone spray or other substances to the walking belt. The safety key must be worn during use; pulling it stops the belt. Folding mechanisms vary, so check the manufacturer’s guidance on how to fold and move the machine safely. Learn more about folding treadmills and folding mechanisms.

Curved manual treadmills

A curved manual treadmill, such as the Assault Fitness AirRunner, is non-motorized. The user’s foot strike drives the belt, and the treadmill slows to a stop on its own; there is no emergency stop button. The AirRunner manual states that the unit weighs 280 pounds, has a running area of 17.1 by 62.2 inches, and a maximum user weight of 350 pounds. Clearance requirements are 0.5 meters on the left, right, and front, and 2.0 meters (79 inches) behind. The manufacturer recommends that children under 16 not use the treadmill and that you consult a physician before beginning. Because the belt moves only in one direction, always grasp the handrails when mounting and dismounting. For more on this style, see curved treadmills and manual treadmills.

Child safety around treadmills

The American Academy of Pediatrics (AAP) warns that home exercise equipment can cause serious injuries to young children. According to the National Electronic Injury Surveillance System, nearly 21,000 children were treated in emergency departments for injuries from home exercise equipment in 2019 alone. The AAP advises that treadmills should be unplugged when not in use, and the safety key should be removed and stored separately. If possible, install a lock on the workout room. The Consumer Product Safety Commission (CPSC) has recalled treadmills after injuries; you can check current recalls at cpsc.gov/recalls and SaferProducts.gov. Always supervise children and keep them away from moving belts. For routine safety practices, see treadmill safety checks and safety accessories.

What to look for when choosing a treadmill by use

Before you decide, review these points drawn from the manuals and guidelines above:

  • Intended activity: Walking pads are built for speeds up to about 4 mph; running requires a full-size treadmill with a stronger motor and longer deck.
  • Space and clearance: Check the manufacturer’s required clearance around the machine. Some models need as little as 1 foot on each side, others require 2 meters behind.
  • Electrical requirements: Many treadmills need a dedicated 15-amp circuit and a grounded outlet. Avoid GFCI outlets and extension cords unless the manual explicitly permits them.
  • Safety key: Always use the safety key or clip. It stops the belt if you fall, and removing it prevents unauthorized use.
  • Folding and storage: If floor space is tight, a folding treadmill can be stored upright. Follow the manual’s instructions for folding and moving.
  • Maintenance: Lubrication schedules and belt adjustments vary. Use only the products and intervals specified in your owner’s manual.
  • Health clearance: Several manuals and the AAP recommend talking with a doctor before starting an exercise program, especially if you have pre-existing health conditions.

For a broader look at selecting a home treadmill, read our how to choose a treadmill guide and explore the treadmill buying guides section.

Frequently asked questions

Can I use a walking pad for running?

Walking pads are typically limited to lower speeds. The UPLIFT Desk walking pad, for instance, reaches a maximum of 4.0 mph, which is a brisk walking pace. For running, you need a treadmill that supports higher speeds and has a longer, wider running surface. Check the specifications of any model you consider.

Do I need a dedicated electrical circuit for my treadmill?

Some treadmill manuals, like the one for the Spirit CT800, specify a dedicated 15-amp circuit to prevent tripping the breaker. Others may simply require a grounded outlet and a surge suppressor. Always follow the electrical instructions in your treadmill’s manual, and never use a GFCI outlet unless the manufacturer says it is acceptable.

How can I keep my children safe around a treadmill?

The American Academy of Pediatrics recommends unplugging the treadmill when not in use, removing the safety key and storing it out of reach, and supervising children at all times. If possible, lock the room where the treadmill is kept. Regularly check cpsc.gov/recalls and SaferProducts.gov for any safety notices.

For more detailed comparisons and to see how different treadmills fit specific activities, visit our Treadmills by Use page.

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