A new study from Penn State University has produced a finding that will come as welcome news to running parents everywhere: pushing a jogging stroller while running actually reduces impact forces per step compared to running without one. The research, which used motion capture and force plate analysis on experienced runners, challenges the widespread assumption that stroller running is inherently harder on the body.
The biomechanical explanation is intuitive once you understand it. Runners pushing a stroller naturally adopt a slightly more upright posture and a marginally shorter stride length, both of which reduce the peak ground reaction forces transmitted through the legs on each footstrike. The stroller handlebar also provides a subtle braking effect that reduces the eccentric loading on the quadriceps during downhill sections — a common source of post-run soreness and overuse injury.
The researchers are careful to note that reduced impact per step does not necessarily mean stroller running is easier overall. Metabolic cost — the energy required to maintain a given pace — is still higher when pushing a stroller due to the added resistance and the biomechanical constraints of maintaining contact with the handlebar. Runners typically run 10-15% slower at the same perceived effort when pushing a stroller, which is consistent with previous research on the metabolic demands.
The practical implications are significant for the large and growing population of running parents. The study suggests that stroller running, far from being a compromise that runners should minimise, could actually serve as a useful low-impact training tool — a way to accumulate mileage with less skeletal stress. Combined with the obvious childcare benefits, this reframes stroller running not as a sacrifice but as a genuinely smart training strategy.