Skipping costs roughly 30 percent more metabolic energy than running at the same speed, so by the most straightforward measure of locomotor efficiency it is considerably less efficient. That gap is real, reproducible, and large enough that no amount of technique refinement closes it on flat ground at Earth gravity. But “efficient” is a slippery word when applied to human movement, and the full picture of skipping versus running involves trade-offs in joint loading, muscle demand, terrain adaptability, and even gravitational environment that make the comparison far more interesting than a single calorie number suggests.
Why Skipping Costs More Energy
The primary reason skipping is metabolically expensive comes down to how high your body travels with each stride cycle. When you skip, your center of mass bounces higher off the ground than it does during running at the same pace. That extra vertical displacement, especially during the “hop” phase of each skipping cycle, requires more work against gravity on every single stride. A biomechanical simulation study of adults moving at 2.5 meters per second found that the increased metabolic cost of skipping was directly associated with this larger vertical displacement of the body’s center of mass during both the support and flight phases of the hop.1PubMed. Muscle contributions to propelling the body upward differ between skipping and running In plain terms, each skip lifts you higher than each running stride does, and lifting your body weight higher costs more fuel.
The gait mechanics reinforce this. Skipping involves two consecutive steps on each limb that differ from each other and from a normal running stride, incorporating phases of double support, flight, and single support that running simply does not have. Ground reaction forces, joint torques, and power profiles are all substantially different between the two gaits.2PubMed. Gait biomechanics of skipping are substantially different than those of running You are not just running with an extra bounce added on top. The entire movement pattern is restructured, with a short “step” followed by a longer “hop” on each side. That asymmetry within each stride is part of what makes skipping feel playful and rhythmic, but it is also what drives up the energy bill. The shorter steps in a skipping cycle are less mechanically effective at covering ground than a running stride of equivalent effort.
Does Speed Change the Equation?
One of the more surprising findings in locomotion research is that skipping becomes relatively cheaper as you go faster. At slow speeds, skipping is especially wasteful. The short bouncing steps that characterize slow skipping are even shorter than the pendulum-like vaulting steps, which compromises the spring-mass mechanics your legs would otherwise use to recycle energy. As speed increases, skippers take longer bouncing steps with a stiffer trailing limb, improving the effectiveness of the elastic bounce that stores and returns energy through tendons and muscles.3PubMed. Reducing cost of transport in asymmetrical gaits: lessons from unilateral skipping
So the cost of transport, meaning the energy needed to move one kilogram of body weight one meter, drops as skipping speed rises. Running shows a similar relationship but starts from a lower baseline. The practical upshot is that the efficiency gap between skipping and running narrows somewhat at higher speeds, but running still wins. If you have ever tried to skip fast, you have probably noticed it feels more natural and less clownish than slow skipping does. There is a biomechanical reason for that: at higher speeds, your body can better exploit its built-in spring mechanisms, and the gait starts to feel less like an awkward hop and more like a coordinated bounce.
The Joint-Loading Trade-Off
Here is where the conversation gets genuinely useful for people making real exercise decisions. Skipping may burn more energy per kilometer, but it also puts substantially less stress on the knee. A direct comparison at matched speed found that skipping had lower tibio-femoral and patello-femoral joint contact forces and lower cumulative loads per kilometer, even though its metabolic cost was about 30 percent higher.4PubMed. Skipping has lower knee joint contact forces and higher metabolic cost compared to running The lower knee loads are a direct consequence of those shorter steps. Because each skipping step covers less ground than a running stride, your knee never extends and absorbs force the way it does during the longer ground contact of running.
The trade-off is not free, though. Skipping shifts mechanical demand downward from the knee to the ankle. Research comparing muscle and joint demands between the two gaits confirmed that while running produced greater knee extensor demand and higher patella contact forces, skipping produced greater ankle contact forces and required more work from the ankle plantarflexor muscles.5Journal of Applied Biomechanics. Differences in Muscle Demand and Joint Contact Forces Between Running and Skipping Hip contact forces, interestingly, showed no meaningful difference between gaits.
For anyone dealing with patellofemoral pain, runner’s knee, or recovering from a knee injury, this redistribution is genuinely attractive. You can get a cardiovascular workout with higher calorie burn per minute while loading your knees less per kilometer of distance. The catch is that your Achilles tendon and calf muscles are working harder, so if you have a history of Achilles tendinopathy or calf strains, skipping could aggravate those issues instead. The body does not eliminate force; it reroutes it.
What Your Nervous System Does Differently
Given how different skipping looks and feels from running, you might expect the brain to use a completely different motor program to execute it. The reality is more nuanced. A study that recorded electrical activity from eight leg muscles during both skipping and running at 2.5 meters per second found that participants used a similar number of muscle coordination modules for each gait, roughly three to four per person. At the group level, three of these modules were shared, or “generalized,” across both gaits.6PubMed. Generalized modules reflect similar biomechanical subtasks across skipping and running Each individual participant also had at least one module that carried over between skipping and running.
This matters because it suggests your nervous system does not build skipping from scratch. It repurposes much of the same muscular coordination it already uses for running, then tweaks the timing and emphasis. That is likely why most healthy adults can skip without practice even if they have not done it since childhood. The underlying motor blueprint is already in place from running and walking. The differences in metabolic cost and joint loading come not from radically different muscle recruitment but from changes in how those muscles are timed and loaded within each stride cycle.
Why Skipping Could Be the Better Gait on the Moon
The efficiency ranking between skipping and running flips when you reduce gravity. On Earth, the extra vertical displacement of skipping is expensive because gravity is strong and pulling you back down costs your muscles dearly on the way up. But in lower gravity, that penalty shrinks dramatically. Research on locomotion in simulated reduced gravity has shown that as gravity drops, gait transitions change. The walk-to-run transition speed slows, the boundary between walking and running blurs, and bouncing gaits start to look different.7PubMed. Gait transitions in simulated reduced gravity
Analysis of skipping energetics suggests that skipping could become the preferred gait on the Moon and possibly on Mars, where the metabolic penalty for vertical displacement drops with the gravitational pull. One review noted that skipping consumes 24 to 30 percent more metabolic energy and about 15 percent more mechanical energy than running at the same speed on Earth, but in reduced-gravity environments skipping might actually become energetically beneficial and could emerge as the primary locomotion gait.8The Royal Society. Skipping on uneven ground: trailing leg adjustments simplify control and enhance robustness Apollo astronauts famously adopted a loping, skip-like gait on the lunar surface, and this was not just playfulness. It was their bodies naturally finding the movement pattern that felt most economical in one-sixth gravity.
There is also a stability argument. Skipping involves alternating lead legs and a double-support phase that running lacks, potentially making it more adaptable to uneven terrain. On a surface like the Moon, where footing is uncertain and reaction time to obstacles is critical, skipping’s built-in redundancy could provide a margin of safety that running does not.
When Skipping Actually Makes Sense on Earth
If pure locomotor efficiency, meaning getting from point A to point B using the least energy, is your goal, running wins every time on flat ground at normal gravity. But most people who exercise are not optimizing for transport efficiency. They are optimizing for some combination of cardiovascular fitness, calorie burn, joint health, enjoyment, and long-term sustainability. Viewed through those lenses, skipping has real advantages.
The 30 percent higher metabolic cost is actually a selling point if you want more calorie expenditure in less time or distance. A kilometer of skipping demands more from your cardiovascular system than a kilometer of running does, which means you can get a comparable or greater training stimulus while covering less ground and accumulating less repetitive impact on your knees. For someone returning from a knee injury who still wants a vigorous weight-bearing workout, skipping could bridge the gap between low-impact rehabilitation exercises and full running.
Skipping also functions as a plyometric exercise. The repeated hop-step pattern trains explosive power in the lower limbs, particularly in the calves and ankles. Plyometric skipping drills have been shown to produce measurable improvements in vertical jump ability, with one training study finding a roughly 4 percent gain in vertical jump height over the intervention period.9COMPETITOR: Jurnal Pendidikan Kepelatihan Olahraga. Effect of Plyometric Skipping and Knee Tuck Jump Training On The Vertical Jump Ability in the Volleyball That may not sound like much, but for athletes in sports like volleyball and basketball where every centimeter of vertical leap matters, it adds up. The elastic, bouncy nature of skipping trains the stretch-shortening cycle of the calf and foot muscles in ways that steady-state running does not.
The Asymmetry Problem
One underappreciated concern with skipping is that it is inherently asymmetrical. Most people have a preferred lead leg and will default to it unless consciously alternating. Over time, this can reinforce or worsen existing muscle imbalances and side-to-side strength discrepancies. Research on single-leg tasks in athletes has consistently found that the dominant leg produces different force profiles than the non-dominant leg, with measurable asymmetries in ground reaction force, joint moments, and reactive strength that can exceed 10 to 15 percent.10PubMed Central. Lower-limb asymmetries in jump athletes during single-leg drop jump
Running is symmetric by nature: each leg does the same job in alternation. Skipping, by contrast, assigns different roles to the “step” leg and the “hop” leg within each stride, and if you always lead with the same side, one leg is consistently doing the bigger bounce while the other handles the shorter step. If you plan to use skipping regularly as exercise, deliberately alternating your lead leg every minute or so is worth the conscious effort. It feels awkward at first because most people have a strong side preference, but it distributes the training load more evenly and avoids building a lopsided movement pattern.
Why Adults Stop Skipping
Children skip spontaneously. It is one of the fundamental movement patterns that emerges during normal motor development, usually appearing around age four or five. By adolescence, most people stop skipping entirely, not because they lose the ability but because social norms discourage it. An adult skipping down a sidewalk draws attention in a way that an adult jogging does not, and that social friction is probably the single biggest barrier to skipping as exercise.
From a physiological standpoint, there is no age-related reason healthy adults cannot skip. The motor modules are shared with running, as discussed above, and the movement does not require any range of motion or coordination that a person capable of jogging would lack. Some physical therapists and coaches have started incorporating skipping into warm-up routines and rehabilitation programs precisely because it loads the body differently from running while still being a vigorous, weight-bearing activity. The psychological component is worth acknowledging, too: skipping is genuinely fun in a way that grinding out miles on a treadmill is not, and enjoyment is one of the strongest predictors of exercise adherence.
If you can get past the self-consciousness, mixing short bouts of skipping into a running workout offers a way to break up repetitive knee loading, spike your heart rate, train your calves and ankles more aggressively, and add variety to a routine that might otherwise feel monotonous. A few hundred meters of skipping mid-run is enough to notice the difference in your breathing and in where your legs feel the work.
Tendon Energy Storage and the Achilles Factor
Both running and skipping rely on elastic energy storage in tendons, particularly the Achilles tendon, to recycle mechanical energy and reduce the metabolic cost of bouncing. Research on bouncing gaits has found that the Achilles tendon alone can account for more than 45 percent of the mechanical power at the whole-body level during hopping movements, with the tendon’s contribution varying by movement frequency.11Journal of Experimental Biology. The influence of in vivo mechanical behaviour of the Achilles tendon on the mechanics, energetics and apparent efficiency of bouncing gaits This tendon acts like a spring: it stretches as you land, stores energy, and snaps back to help propel you upward during push-off.
In running, this spring mechanism is well-tuned to the stride frequency and ground contact time of normal jogging speeds. Skipping, with its altered timing and higher vertical oscillation, likely loads the Achilles tendon differently and at different rates within the stride cycle. That heavier ankle-level demand identified in the joint-loading research is not just a muscle story; it is also a tendon story. Your Achilles is working harder during skipping, storing and releasing more energy per cycle. For people with healthy, well-conditioned tendons, this is fine and may even strengthen the tendon over time. For people with existing Achilles problems, it is a reason to introduce skipping gradually rather than jumping in with long bouts.
The interplay between tendon stiffness and metabolic efficiency also helps explain why skipping improves at faster speeds. A stiffer trailing limb at higher speeds, as the transport-cost research found, allows better energy return from the tendon spring. At slow speeds, the tendon is not loaded enough to store and return energy effectively, so more of the work falls on the muscles directly, which are far less efficient at converting metabolic energy into mechanical movement than tendons are at recycling it passively.