Cardio Machines Guide: How to Choose the Right Type for Your Home

Cardio machines come in six practical types: recumbent bikes, upright bikes, rowers, air bikes, treadmills, and ellipticals. Choose by your joints first, then your floor space, then the kind of effort you’ll repeat. Bikes are the gentlest and usually the cheapest. Rowers and air bikes add your arms. Treadmills came out highest for energy use in lab comparisons, and jogging on one loads your legs far more than an elliptical does. As of Nov 2026, listed home prices run from about $290 for a basic upright bike to about $1,300 for a full-size elliptical.

How to choose: cardio machines compared

Three questions settle most decisions. Do you need to stay off your feet? How much floor can you give up? Do you want steady sessions or short, hard intervals?

What the resistance type changes

Air and water respond to your effort, so a beginner and an athlete can share one machine. Magnetic machines give you a number to return to, which helps if you like repeating a session exactly. Power needs vary too: Schwinn’s 230 recumbent plugs into a wall, while its AD6 air bike runs on 2 AA batteries.

Recumbent vs upright bikes

A recumbent seats you low with a backrest, which makes it easier to get on, while an upright takes far less floor: Schwinn’s 130 is 41 x 21 inches, against 64 x 28 for its 230 recumbent. Small studies found little difference in leg muscle activity between them. Our recumbent bike guide covers fit, evidence, and who each suits.

Rowers: water, air, and magnetic

• Air: The Concept2 RowErg separates into two pieces without tools. Its user limit shows why these numbers need care: 500 lb by Concept2’s own test, and 300 lb under a European standard.
• Water: Drag rises with your stroke, and most store upright with the water inside. Our water rowing machine guide covers upkeep, noise claims, and how they compare.
• Magnetic: Usually the cheapest. Check the rail, because it limits your stroke. Sunny’s SF-RW523021 lists 49 inches.

If you’ve had back trouble, build up slowly on any rower.

Air bikes

An air bike links a fan to pedals and moving handles, so your arms can drive it too. Compare user limits and warranties: frame terms run from 1 year overall on the Titan Fan Bike to 10 years on the Schwinn AirDyne AD6. Our Assault Fitness guide covers one major brand, our Assault bike parts guide covers upkeep, and our Centr guide covers a home-focused range.

The hard feel doesn’t guarantee the highest burn. In a 1996 JAMA study of 13 healthy young adults, an Airdyne produced lower energy use than the treadmill, rower, and stair stepper at the same perceived effort. That’s one small study on older equipment.

Treadmills

Check the deck first. The SOLE F63 and Horizon 7.0 AT have 20 x 60 inch decks. Sunny’s SF-T722022 has a 47.2 x 17.3 inch surface and a 9 mph top speed, which suits walking and light jogging better than running. Folding helps less than you’d hope: the SOLE folds to 42 inches long but stands 71 inches tall.

Ellipticals

Ellipticals keep you standing without the landing. A study of 18 trained runners found oxygen use and heart rate didn’t differ between treadmill and elliptical at matched relative workloads, so it’s a reasonable stand-in when you need less running. But another study of 16 runners measured more knee motion on ellipticals than in running, and its authors cautioned that a lateral elliptical may aggravate kneecap pain.

Compare stride length: 11.4 inches on Sunny’s compact SF-E324005, 18 on the Horizon EX-59, and 20 on the SOLE E25. Sunny’s own guide treats 12 inches as the low end of a standard stride.

Joint impact and energy use

The clearest numbers come from a 2014 study of 75 adults that measured weight-bearing at the foot during brief bouts. Average load was 201% of body weight jogging overground, 175% jogging on a treadmill, 112% walking, and 73% on an elliptical. It doesn’t measure force inside the joint.

For energy use, a 2024 study of 30 recreationally active men in their early 40s put the treadmill highest, followed by stair climber, elliptical, spin bike, upright bike, rower, and recumbent. The authors add that enjoying a machine helps you stick with it. That’s our main advice too, since no lab ranking can tell you what you’ll still use in a year.

How much cardio you need

The CDC says adults need 150 minutes of moderate activity a week, or 75 minutes of vigorous activity, or an equivalent mix, plus muscle-strengthening work on at least 2 days. The US Physical Activity Guidelines frame the moderate target as 150 to 300 minutes. Thirty minutes on five days reaches the lower figure. For the rest of the week, see our guides to kettlebells, strength accessories, and conditioning equipment.

Space, floors, and specs

Height catches people out too. The SOLE E25 stands 70 inches before you step on, and you rise with the pedals. Weight matters on upper floors: the Horizon treadmill is 277 lb. A mat protects the floor, and our gym flooring guide covers the options.

Price tiers

Type sets the price more than brand does. These tiers cover home machines only, because we couldn’t confirm commercial pricing.

Safety

• Treadmills and children: After a 6-year-old died on a Peloton Tread+, the CPSC warned that people, pets, and objects could be pulled under its rear. Its advice applies well to any home treadmill: keep objects away, unplug it after use, and store the safety key out of children’s reach.
• Clip in: Attach the safety key to your clothing, and straddle the deck when you start the belt.
• Air bike handles: They move whenever the pedals do, so keep children and pets clear.

Stop if you feel chest pain, dizziness, or sharp joint pain. If you have a heart, joint, or other chronic condition, talk to a physician before you start.