Running vs walking changes the comparison for weight loss

A session’s energy use is only part of the outcome

To understand longer-term weight change, it helps to consider trials of exercise intensity alongside studies comparing expenditure. A randomized trial assigned 71 patients with severe obesity to 24 weeks of moderate-intensity continuous exercise or a program combining that exercise with high-intensity intervals.[8] Intervals mean periods of harder exercise separated within the session. This study tested different combinations of intensity; it was not a direct contest between walking and running.

Among participants who completed the prescribed program, energy expenditure during exercise increased by 10% in the combined group and 7.5% in the continuous-exercise group. The respective 95% confidence intervals were 3–17% and 4–10%, and there was no between-group difference. Weight loss, meanwhile, was 5 kg and 2 kg, respectively: the combined group lost an average of 3 kg more.[8] The conclusions about changes in exercise expenditure and changes in weight were therefore different.

For this intensity trial, the reported intervals show the uncertainty around each group’s estimated increase in exercise expenditure. The expenditure analysis included 16 completers in the combined group and 24 in the continuous-exercise group, rather than everyone originally allocated to treatment.[8] Random assignment makes the trial valuable, but the restriction to those who completed the protocol remains part of its interpretation. When reading the outcome, retain both pieces of information: how the groups were formed and whose results entered this analysis.

The trial cannot tell us that running beats walking by that weight difference, because those were not its comparison groups.[8] It does show why weight change cannot be read as a simple proportional conversion of an increase in energy used during exercise. A session’s measured expenditure and a person’s later body weight are related questions, yet they are not identical measurements. Treating them as interchangeable loses the distinction the trial itself revealed.

A small walking intervention measured this gap in more detail. Sixteen sedentary adults with overweight completed 12 weeks of supervised walking, targeting expenditure of 20 kcal per kg of body weight per week. Researchers assessed total daily expenditure, resting and sleeping metabolism, walking efficiency and food intake.[15] This was an intervention with a specified exercise target and measurements across everyday life, rather than a test confined to the minutes spent moving along a laboratory route.

Total daily expenditure was measured with doubly labeled water, a method using labeled water to assess energy use during daily life. A whole-room system measuring respiratory gases assessed resting and sleeping metabolism and heat production associated with eating. Physical activity was monitored objectively; walking efficiency was assessed during standardized treadmill walking. Food intake was examined through both self-report and an approach based on the balance between intake and expenditure.[15] These different measurements let the researchers examine the whole day and its components separately.

Magnetic resonance imaging showed a 5% reduction in liver and kidney volumes, with no change in brain volume. The increase in daily moderate-to-vigorous activity was smaller than expected. Reductions in resting and sleeping metabolism accounted for most of the compensation reported in the study.[15] Its distinctive contribution was to examine changes that a bathroom scale could not separate, including organs and activity outside the supervised exercise. The possible contribution of organ changes to constrained expenditure still needs further investigation.[15]

Total daily expenditure increased, but weight loss was minimal even though body composition improved. Resting and sleeping metabolism declined, and walking became more efficient. Food intake and the heat production associated with eating did not change.[15] Energy used during the assigned exercise therefore did not simply become an equal addition to everyday expenditure. The researchers described these offsetting changes as energy compensation. The result was more complicated than a calculation that adds each exercise session to an otherwise unchanged day.

This was a small walking intervention without a running comparison group.[15] It does not establish that runners would have experienced the same changes or that walking always produces this pattern. In the earlier intensity trial, resting metabolism did not change in either group.[8] Keeping these findings together prevents a single explanation from becoming a universal account of how every body responds. Different study conditions produced different observations about resting metabolism, and both belong in the evidence.

Picture a week in which you walk after working late and run on a day off. Adding the estimated expenditure from each session and translating the sum into expected weight loss leaves out the changes in metabolism and movement efficiency measured in the walking intervention.[15] A record can show which exercise actually happened. It cannot, on its own, settle the question of what your body weight should do afterward. That makes the record useful without asking it to answer more than it contains.

Tracking exercise and tracking health ask different questions

Even the yardstick used to prescribe exercise has been studied. A small intervention compared walking and running prescribed by time with walking and running prescribed by distance. Fifteen adults with overweight who were otherwise healthy completed the study. Weekly adherence did not differ significantly, but body weight and blood glucose declined in the distance group and increased in the time group.[3] The finding describes the direction of weight change rather than a difference stated in kilograms.

The comparison concerned time-based and distance-based prescriptions, and how closely those approaches captured accumulated exercise.[3] It did not separately compare a walking-only group with a running-only group. With few completers, the findings need to remain attached to that limited setting. For a personal notebook, the practical question is which measure helps you check what you completed. The study does not require turning time and distance into rival methods with a universal winner.

Health outcomes beyond weight have also been examined in a large observational study. Researchers followed 33,060 runners and 15,945 walkers for 6.2 years, comparing baseline exercise expenditure with newly reported diagnoses. Participants reported physician-diagnosed conditions including hypertension, high cholesterol and diabetes.[13] Because exercise was not assigned, the results describe associations. They do not by themselves establish that an activity caused a particular reduction in disease risk for an individual.

For each MET-hour per day, the reported lower risk of developing diabetes was 12.1% for running and 12.3% for walking; the difference was not statistically significant. Differences between running and walking were also not significant for hypertension or coronary heart disease. The association with lower risk of high cholesterol was slightly greater for walking, with a significant difference at P = 0.04.[13] At equivalent energy expenditure, these health associations were broadly similar. An absence of a significant difference still does not prove identical effects for every person.

Body-size changes had a stronger association with running in the relevant groups, while several health associations were similar for walking and running.[1][13] That is a difference in outcomes, rather than evidence that one paper must be wrong. A day spent walking the route does not become worthless because another study found a stronger running association with BMI. The separate feature on cycling, walking commutes and body weight addresses active travel; this feature focuses on the measure used to compare walking and running.

Common misconceptions

“Equal distance always means equal energy expenditure.” Experiments with the same participants do not support that rule. Running used more energy than walking the same distance, while another study comparing groups with different body sizes found similar total expenditure.[4][5][7] Pulling out averages without checking who was compared can produce opposite slogans from compatible results. Before accepting either slogan, look for whether activity changed within each person or whether different people performed the different activities.

“Running makes you lose 90% more weight than walking.” That statement extends a specific observational finding too far. The figure describes a difference in associations between exercise changes and body-size changes within a particular baseline BMI category.[1] It is neither an individual prediction nor the measured effect of assigning someone to switch activities. For women, the relevant body-size condition must remain visible. Planning to run and treating a cohort association as a personal guarantee are different decisions.

“If expenditure rose but weight barely changed, you must have eaten more.” The walking intervention found changes in metabolism and walking efficiency without a change in food intake.[15] Food records can be useful evidence, but appetite cannot automatically explain every gap between exercise expenditure and expected weight loss.

What you can do today

• Choose a possible walking route covering 1,600 m one way, matching the distance used in the experiment. The prescribed walking speed there was 86 m per minute.[4] Put departure and return times into your plan and choose a day to walk. Use the route as a concrete starting point, rather than treating the research speed as a requirement for your outing.
• If you already run comfortably, try the same 1,600 m route on a separate day. The experiment compared running at 160 m per minute.[4] The useful planning step is to schedule walking and running along a common route; reproducing the laboratory speed is not the goal. This also keeps the comparison tied to an activity you can already complete.
• Record both distance and elapsed time, then review the routes you completed at the end of the week. The small prescription study found different directions of weight change but no significant difference in weekly adherence.[3] If comparing energy displays, compare your own walking and running outings on the same route. The women’s experiment covered 1.609 km and found different total expenditure between body-size groups performing the same activity.[7] Keep the actual distance alongside the planned time and compare similar conditions rather than another person’s display.
• Separate the weight change you hope to observe from the health-check measures you want to discuss. The cohort studies gave different comparisons for body-size changes and disease incidence.[1][13] If you have a medical condition or concerns about exercise, consult a doctor about which activities are appropriate before deciding what to schedule.

Schedule movement alongside walks and runs at On the Shore Tachikawa

Just as you choose days to walk or run the same route, you can set aside a time and place for another form of movement. On the Shore Tachikawa offers a place to maintain that habit alongside your walks and runs, with attendance fitting into daily life rather than chosen only by an energy display.

The lava-stone hot yoga studio is on the third floor of Etoile Bldg at 2-14-10 Akebonocho, Tachikawa, Tokyo, a 1-minute walk from JR Tachikawa Station’s North Exit. It is open every day 8:00–23:30. Alongside 25+ kinds of yoga lessons, its options include room-temperature yoga, personal training, HIIT, Pilates, boxercise and women-only kickboxercise.

Before putting a studio visit alongside your walking and running days, consider participation requirements and language support. Anyone whose doctor has prohibited exercise cannot attend; during pregnancy, guests cannot take lava-stone hot yoga, although room-temperature maternity yoga is available. The studio describes its English support as follows: “Many of our yoga instructors speak English, and the studio’s owner often helps guests from the US bases in English herself.”

For ¥1,980 including tax, the yoga trial includes a 60-minute lesson, yoga mat rental, 2 bath towels and 1 face towel. When choosing a time to attend, consult the studio website, trial booking page and price information.

References

1. Greater Weight Loss from Running than Walking during 6.2-yr Prospective Follow-up — P. Williams, 2013, Medicine and science in sports and exercise. DOI: 10.1249/mss.0b013e31827b0d0a
2. A Prospective Study Comparing Distance-based vs. Time-based Exercise Prescriptions of Walking and Running in Previously Sedentary Overweight Adults — Cody E. Morris et al., 2017, International Journal of Exercise Science. DOI: 10.70252/yjix2289
3. Energy Expenditure Comparison Between Walking and Running in Average Fitness Individuals — L. Wilkin et al., 2012, Journal of Strength and Conditioning Research. DOI: 10.1519/jsc.0b013e31822e592c
4. Comparison of Energy Expenditure to Walk or Run a Mile in Adult Normal Weight and Overweight Men and Women — M. Loftin et al., 2010, Journal of Strength and Conditioning Research. DOI: 10.1519/jsc.0b013e3181cc26cd
5. Comparison of energy expenditure, economy, and pedometer counts between normal weight and overweight or obese women during a walking and jogging activity — J. LeCheminant et al., 2009, European Journal of Applied Physiology. DOI: 10.1007/s00421-009-1059-9
6. Effect of Aerobic Exercise Intensity on Energy Expenditure and Weight Loss in Severe Obesity—A Randomized Controlled Trial — Jarle Berge et al., 2021, Obesity (Silver Spring, Md.). DOI: 10.1002/oby.23078
7. Walking vs running for hypertension, cholesterol, & diabetes risk reduction — P. Williams et al., 2013, Arteriosclerosis, thrombosis, and vascular biology. DOI: 10.1161/atvbaha.112.300878
8. Multilevel metabolic adaptation to exercise training — T. Knaan et al., 2026, Communications Medicine. DOI: 10.1038/s43856-026-01502-z
9. Comparison of energy expenditure and substrate oxidation between walking and running in men and women — Akitoshi Makino et al., 2022, Physical Activity and Nutrition. DOI: 10.20463/pan.2022.0002

Cover photo: Six lanes run along a track beneath a tunnel-like structure. (Photo: Petewarrior / CC BY 4.0 / Wikimedia Commons)

Information as of October 2026. For your own health, consult a doctor.

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