Preferred Stride Frequency Reduced Energy Cost During Treadmill Walking
Preferred stride frequency emerged as the most efficient walking pattern in this small crossover study of healthy adults, with measurable effects on oxygen uptake, perceived exertion, and affective valence. Nineteen participants, including 11 men and 8 women, completed a familiarization visit and then returned for a second session in which four 15-minute treadmill conditions were tested in counterbalanced order. The comparison was built around each participant’s own preferred stride frequency, first measured in session 1 and then imposed again in session 2, alongside a newly determined preferred stride frequency and two ±10% deviations from the session 2 preference.
The physiologic signal was consistent. Oxygen uptake shifted significantly with stride-frequency condition, and the preferred stride frequency identified during the experimental visit produced lower metabolic cost than the imposed ±10% deviations. Participants also reported lower rating of perceived exertion and more positive valence when walking at their session 2 preferred cadence. In plain clinical terms, the body appeared to settle into a gait pattern that was less costly to maintain and felt better to sustain.
Metabolic Efficiency Matched Subjective Comfort
Walking is often treated as a routine behavior, but even small changes in cadence can alter the mechanical demands placed on the lower limbs and the metabolic work required to keep moving. A stride frequency that diverges from a person’s natural preference can increase the cost of coordination, alter step length, and force compensatory muscle recruitment. Those changes help explain why the preferred cadence in this experiment was associated with lower V̇O2 than the imposed deviations.
The subjective results tracked the physiology. Lower exertion scores and more positive feeling-state ratings suggest that preferred stride frequency did not merely reduce measurable work; it also changed how the activity was experienced. That matters because affective response can shape whether people keep walking at a given intensity, whether they tolerate rehabilitation exercise, and whether a routine bout of treadmill work feels sustainable enough to repeat.
The study design strengthens that interpretation. By using each participant as their own reference point across multiple treadmill conditions, the analysis isolated cadence as the key variable instead of relying on broad between-person comparisons. Repeated-measures analysis showed significant main effects of stride frequency on oxygen uptake, feeling scale, and RPE. Planned contrasts then sharpened the finding: the preferred stride frequency measured during session 2 produced lower V̇O2 and lower RPE than the ±10% deviations, while also generating higher positive valence. The same pattern appeared when session 2 preference was compared with the preferred stride frequency carried over from session 1.
Sex Differences Were Limited to Recovery, Not the Main Walking Response
Women recovered heart rate more quickly after the walking bouts, a finding that may reflect sex-related differences in autonomic recovery dynamics, cardiovascular responsiveness, or recovery kinetics after exercise. Yet the main story did not split along sex lines. No sex-by-condition interactions appeared for any primary outcome, which means the cadence-related changes in oxygen uptake, perceived effort, and affective valence were broadly similar in men and women within this sample.
That is an important nuance for applied exercise physiology. The preferred stride frequency effect was not confined to one sex, at least in this cohort of healthy adults. Within the limits of a small study, the data support a shared biomechanical principle: when people walk close to their own preferred cadence, the task costs less energy and feels less burdensome. The faster heart-rate recovery in women adds a separate physiologic thread, but it did not alter the cadence-response pattern seen during the treadmill sessions.
Why Preferred Cadence May Feel Easier to Sustain
The likely explanation sits at the intersection of biomechanics and central perception. Humans tend to adopt gait patterns that minimize the combined cost of movement, stability, and muscular effort. A preferred stride frequency may represent the point where mechanical efficiency and neuromotor comfort align, reducing the need for unnecessary oscillation in center of mass, lowering muscle co-contraction, and limiting the sense of strain that often accompanies forced pacing.
This is clinically relevant because perceived exertion is not a trivial accessory measure. When RPE rises, adherence tends to fall. When affect turns negative, people are less likely to repeat the activity. In rehabilitation, fitness training, and daily walking programs, a cadence that preserves positive valence may support greater engagement than a faster or slower pace imposed for external reasons. The physiologic advantage and the psychological advantage appear to move in the same direction here.
Small Sample, Narrow Population, and a Focus on Healthy Adults
The findings should be interpreted with the restraint warranted by the sample size. Nineteen healthy adults is enough to detect within-person changes under controlled conditions, but not enough to define universal gait prescriptions or to map how disease states would respond. The participants were healthy, and the treadmill setting is not the same as overground walking in daily life, where terrain, attention, footwear, and environmental distractions all influence cadence and effort.
The absence of sex-condition interactions also needs to be read in the context of sample size. A nonsignificant interaction does not prove there is no sex difference in all populations; it only shows that no differential response appeared here. Even so, the overall pattern was coherent across the cohort. Preferred stride frequency lowered metabolic demand, reduced the sense of exertion, and improved the emotional tone of walking.
For clinicians and exercise specialists, the practical message is straightforward. When walking feels unusually hard, the answer may not be to impose a sharper cadence, but to identify the stride frequency the person naturally adopts and build from there. The study leaves open how these effects behave in older adults, patients with cardiopulmonary disease, or people walking at longer durations and different speeds, where fatigue and compensatory mechanics may shift the balance again.