Treadmill vs Elliptical: Calories, Joint Impact and Weight Loss

Treadmill vs elliptical comes down to two questions: whether your joints tolerate impact, and which machine you will use four or five times a week. This page is for home buyers choosing between the two, and for anyone weighing an exercise bike as a third option. Below the head-to-head and the two representative picks, it answers which burns more calories, what each does to your knees, which is better for weight loss, and where the bike fits.

Head-to-Head

Impact and your joints

Every running stride lands with a multiple of your body weight, and a treadmill deck only cushions part of it. That impact is not purely bad — bones and tendons adapt to it, and that adaptation is part of what makes running valuable — but it is exactly what an inflamed knee, a heavy body or a recovering runner does not want. Walking on a treadmill sits in the middle: modest impact, very tolerable for most people.

An elliptical removes impact almost entirely because your feet never leave the pedals. That is why it is a common choice in rehab settings and for sore knees. The cost is specificity: the elliptical motion exists nowhere else in your life, so the fitness transfers but the movement pattern does not.

Calorie burn and training effect

At matched effort the two machines burn calories in the same neighborhood, with hard treadmill running holding a modest edge because moving your body against impact is expensive. The practical difference is behavioral: it is easy to drift on an elliptical, letting momentum do the work at a low heart rate, whereas a treadmill belt forces you to keep pace or step off.

If you train by heart rate or intervals, either machine does the job. If you tend to coast, the treadmill's forced pace is a feature — and if you tend to push through discomfort you should not, the elliptical's forgiveness is the feature instead.

Space, noise and living with one

Treadmills are the heaviest, loudest common cardio machine: motor noise plus footfall, which travels through apartment floors in a way neighbors notice. Folding decks help storage but not weight. Ellipticals on magnetic resistance are close to silent — usually the deciding factor for upstairs apartments — but their fixed footprint is tall and long, and poorly built ones can develop clicks that are their own annoyance.

Both machines are common on the secondhand market; inspect the belt and deck on a used treadmill, and the pedal bearings and stride linkage on a used elliptical. Whichever you choose, measure ceiling height too — an elliptical raises you several inches off the floor at the top of the stride.

Who should buy a treadmill

• You want to get better at walking or running specifically — including race training, incline hiking prep, or building the habit of a daily walk
• You respond well to a machine that sets the pace and holds you to it
• You have healthy joints, or you plan to walk rather than run
• Noise is manageable in your space — a garage, a ground floor, a detached house

Our full treadmill guide covers three picks by use; the representative pick below is an auto-incline folder from that class.

Who should buy an elliptical

• Impact is the problem you are solving: knee or hip arthritis, running injuries, a heavier body, or rehab with a clinician's blessing
• You live above someone and cardio noise is a genuine constraint
• You want long, frequent, low-stress sessions rather than hard intervals
• You like that the moving handles pull your upper body into the work

Our elliptical machine guide covers the full picks; the representative pick below is a magnetic home unit from that class.

Representative Picks

These two are not a mini-roundup — they are one example of each machine type, so the comparison above connects to something concrete. Our full guides go deeper: see the treadmill guide and walking pad guide for the complete picks.

A fair stand-in for what a sensible home treadmill looks like in 2026: auto incline, a folding deck, and a brushless motor that keeps walking-speed noise down — from the same brand as one of the picks in our full treadmill guide.

A true elliptical rather than a compact stepper: magnetic resistance quiet enough for an apartment, a high stated capacity, and the stride length that separates real ellipticals from compact steppers.

Treadmill vs Elliptical: Which Burns More Calories?

The 2024 Compendium of Physical Activities gives MET values (multiples of resting energy use) for both. Multiply METs by body weight in kilograms for a rough hourly figure:

Activity (Compendium code)	METs	kcal in 30 min, 140 lb	kcal in 30 min, 200 lb
Treadmill walk, 3.5–3.9 mph, 0% (17354)	4.8	150	220
Elliptical, moderate (02048)	5.0	160	225
Uphill walk, 6–10% grade (17035)	7.0	220	315
Running, 5.0–5.2 mph (12030)	8.5	270	385
Elliptical, vigorous (02049)	9.0	285	410
Running, 6–6.3 mph (12050)	9.3	295	420
Running, 7.5 mph (12080)	11.8	375	535

At similar effort the two are close. In a 2010 study in the Journal of Strength and Conditioning Research (Brown and colleagues), 18 untrained adults exercised for 15 minutes on each machine at the same rating of perceived exertion; oxygen consumption and energy expenditure did not differ significantly. The treadmill’s edge is the ceiling: a fit runner can hold 7.5 mph and beyond, which no elliptical setting in the Compendium matches.

Do Heart-Rate Zones Work the Same on Both Machines?

Mostly, with one caution. Two studies point in slightly different directions:

• Maximal tests match. Dalleck and Kravitz (Journal of Sports Science and Medicine, 2006) tested 24 adults to exhaustion on both machines and found no significant difference in VO2max, maximum heart rate or test duration. The link between percent of heart-rate reserve and percent of oxygen-uptake reserve was nearly identical on both, with slopes of 1.01 on the elliptical and 1.00 on the treadmill.
• Self-paced sessions can differ. In the Brown study, heart rate averaged 164 beats per minute on the elliptical against 145 on the treadmill at the same perceived effort, while energy expenditure did not differ significantly.

The practical rule: heart-rate-reserve zones, calculated as (maximum heart rate minus resting heart rate) times the target percentage plus resting heart rate, transfer between the two machines. But do not assume that a given heart rate on the elliptical means more work than the same heart rate on a treadmill, and check perceived effort too. A chest strap reads more reliably than the grip sensors built into either console.

Treadmill vs Elliptical for Weight Loss

Weight loss follows weekly energy expenditure, and the machine only matters through how much work it lets you do. Run the numbers for a 176 lb (80 kg) person doing five 30-minute sessions a week, using Compendium values and subtracting the 1 MET you would burn at rest anyway:

Weekly plan	METs	Extra kcal per week, approx.
Brisk flat treadmill walking	4.8	760
Elliptical, moderate	5.0	800
Treadmill walking at 6–10% incline	7.0	1,200
Elliptical, vigorous	9.0	1,600
Running at 6 mph	9.3	1,660

Two points stand out. First, intensity moves the weekly total far more than the choice of machine: vigorous elliptical work and steady running land within a few percent of each other. Second, incline walking is the treadmill’s best weight-loss setting for non-runners, adding about 60% more than flat walking with no landing impact. The WHO guidelines count vigorous minutes roughly double, recommending 150–300 moderate or 75–150 vigorous minutes a week for adults.

So pick the machine you can push hard without pain. For many people with sore knees that is the elliptical; for people who coast on the elliptical, the treadmill’s fixed belt speed keeps the work honest.

Joint Impact: What the Research Shows

The elliptical’s advantage is real but narrower than marketing suggests. A 2007 study in Medicine and Science in Sports and Exercise (Lu and colleagues, 15 men) compared elliptical exercise with level walking:

• Lower loading rates around heel strike on the elliptical, because the foot never lands.
• Greater hip, knee and ankle flexion, and larger hip-flexor and knee-extensor moments, so the thigh muscles and the front of the knee work harder.
• The authors judged it suitable for athletic and rehab use but advised considering knee function and strength first.

Walking is not impact-free either: knee implant measurements (Kutzner and colleagues, Journal of Biomechanics, 2010) put peak knee force at 261% of body weight during level walking. Running adds a landing phase on top of that.

In practice: if impact itself is the problem (stress injuries, shin pain, heavy body weight, a jarring treadmill on an upstairs floor), the elliptical solves it. If pain is at the front of the knee and gets worse with squatting or stairs, the elliptical’s deeper knee bend may not help; lower the resistance, or try walking or a bike before deciding.

Treadmill vs Elliptical vs Bike

An exercise bike takes body weight off the legs entirely, which makes it the gentlest of the three and the easiest to push hard safely. Compendium values for stationary cycling are set by power output: 5.0 METs at 60 watts, 6.0 at 90–100 watts, 8.0 at 126–150 watts and 10.3 at 151–199 watts.

	Treadmill	Elliptical	Exercise bike
Landing impact	None walking; high running	None	None
Body weight carried	All	All	Mostly on the seat
Compendium METs, moderate to vigorous	4.8 to 11.8	5.0 to 9.0	5.0 to 10.3 (to 16.3 above 325 W)
Upper body	Arm swing only	Moving handles	None (air bikes excepted)
Measured output	Speed and grade	Rarely	Watts on most smart and air bikes
Carryover	Walking and running	Limited	Cycling

Choose the bike for bad knees, heavier body weight or short hard intervals; the elliptical for a standing, running-like motion with no landing; the treadmill for walking volume, incline work or running goals. With room for two machines, a bike plus a treadmill covers more than a treadmill plus an elliptical, because the bike adds seated, hard work with no body weight on the legs. Our exercise bike guide and elliptical machine guide compare specific models.

Your Questions, Answered

Is a treadmill or elliptical better for weight loss?

At matched effort they are close enough that it does not decide the purchase. What decides fat-loss outcomes is total consistent output over months — so the better machine is the one you will actually use four times a week, which is usually the one that matches your joints and your noise constraints.

Which is better for bad knees?

Generally the elliptical, because it removes impact while keeping the legs loaded — it is a common choice for impact-free cardio. But knee pain has many causes, and some conditions tolerate walking better than the elliptical's fixed path. If pain is the reason you are choosing, ask a clinician rather than a comparison article.

Does an elliptical build the same fitness as running?

Cardiovascular fitness, largely yes at equal effort. What it does not build is the impact tolerance and specific mechanics of running — so an elliptical-trained person cannot expect to run far comfortably. If being a runner is the goal, you eventually need the treadmill or the road.

Which takes up more space?

Footprints are similar on paper, but folding treadmills store dramatically smaller, while most ellipticals do not fold and stand tall — and they raise the user several inches, so check ceiling height. In a small apartment, a folding treadmill or a walking pad usually wins on pure space.

Can I just get both?

If space allows, they complement each other well — hard walking or running days on the treadmill, easy volume on the elliptical. Most people are better served buying one machine they will use daily; add the second when the first has earned its floor space for a year.

How long on an elliptical equals a 30-minute run?

At vigorous effort, about 31 minutes: the Compendium of Physical Activities rates a vigorous elliptical session at 9.0 METs and running at 6 mph at 9.3. At moderate effort (5.0 METs) it takes about 56 minutes to match the same 30-minute run. Effort level matters far more than the machine.

Does incline walking on a treadmill burn more than the elliptical?

It can. The Compendium rates walking at a 6 to 10% grade at 7.0 METs and at 11 to 20% at 8.8 METs, against 5.0 for a moderate elliptical session and 9.0 for a vigorous one. Steep incline walking roughly matches hard elliptical work, with no flight phase, but it loads the calves and Achilles more.

Is a treadmill or an elliptical better for running training?

The treadmill. A 2006 study found similar maximal aerobic capacity measured on both machines, so the elliptical maintains fitness, but it does not train the landing, stride mechanics or tendon loading of running. Runners use it for cross-training and injury periods, then return to running gradually.

Why is my heart rate higher on the elliptical?

It is a common finding. In a 2010 study, untrained adults averaged 164 beats per minute on the elliptical and 145 on the treadmill at the same perceived effort, with no significant difference in energy expenditure. Use perceived effort alongside heart rate when you switch machines.

Sources

• 2024 Adult Compendium of Physical Activities — Conditioning exercise (elliptical, stair treadmill ergometer, rowing ergometer)
• 2024 Adult Compendium of Physical Activities — full activity list (running, walking, stair climbing, active workstations)
• 2024 Adult Compendium of Physical Activities — Bicycling (stationary cycling by watts)
• Brown et al., J Strength Cond Res 2010 — Comparison of energy expenditure on a treadmill vs. an elliptical device at a self-selected exercise intensity
• Dalleck & Kravitz, J Sports Sci Med 2006 — Relationship between %heart rate reserve and %VO2 reserve during elliptical crosstrainer exercise
• Lu, Chien & Chen, Med Sci Sports Exerc 2007 — Joint loading in the lower extremities during elliptical exercise
• Kutzner et al., J Biomech 2010 — Loading of the knee joint during activities of daily living measured in vivo in five subjects
• World Health Organization — WHO Guidelines on Physical Activity and Sedentary Behaviour (2020), executive summary

How We Research

Comparisons are researched and written by Mike Callahan based on the mechanics of each machine type, manufacturer specifications, and patterns across verified owner reviews. We are not a testing lab and do not claim to be; our full standard is in the editorial policy.

Note: This comparison reflects the general mechanics of the two machine types rather than any single product; the two linked models are representative picks, verified live like every product on this site. If joint pain or a medical condition is driving your choice, get individual advice — a category article cannot see your knees.