# Energy Cost Varies Dramatically Between Walking, Jogging, and Running Over the Same Distance
Walking, jogging, and running the same kilometre burns vastly different amounts of energy, depending on individual factors like body weight, fitness level, and pace.
Running uses the most energy overall. A 70-kilogram person running at moderate speed expends roughly 70 calories per kilometre. Jogging at a slower pace burns approximately 50-60 calories. Walking covers the same distance at only 30-40 calories, making it the most efficient mode of locomotion.
The physics behind this difference lies in how each activity moves your body. Walking keeps one foot in contact with the ground constantly, minimising the energy needed to stay upright. Jogging and running both involve a flight phase where both feet leave the ground simultaneously. Running requires greater force and speed, demanding more muscle activation and metabolic work.
Body weight plays a central role. Heavier individuals burn more calories across all activities. A 90-kilogram person running might expend 90 calories per kilometre, while a 50-kilogram person burns only 50. This linear relationship reflects the mechanical work required to move mass through space.
The distance component matters too. While running burns more calories per kilometre, walking covers that kilometre more slowly and requires less peak power output from muscles. For someone focused purely on calorie burn efficiency, running delivers more results in less time. Walking offers health benefits with lower joint stress and injury risk.
Running economy also varies among individuals. A trained runner uses less energy per kilometre than an untrained runner at the same pace, thanks to refined neuromuscular coordination and movement patterns. Younger people typically demonstrate better economy than older adults, though fitness trumps age in many cases.
The takeaway remains practical: all three activities burn energy and contribute to fitness. Running maximises