ArticleFrontiers in public health2026
Effects of running distance on per-step and cumulative lower-extremity loading during a simulated treadmill half marathon.
Article in Frontiers in public health, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Background: The cumulative damage impulses have been proposed as a crucial parameter for analyzing joint kinetics and tissue loading during prolonged running. Although prolonged running may have detrimental effects, research focusing on the bones and soft tissues of the lower extremity remains limited. Therefore, this study aimed to examine how treadmill half-marathons influence biomechanical variables in high-performing endurance runners. We additionally quantified per-step peak load, impulse, cumulative impulse, and cumulative weight impulse of the Achilles tendon (AT) and the patellofemoral joint (PFJ) during half marathon running. Method: Sixteen high-performing endurance runners (9 males and 7 females) completed a half marathon on a Zebris FDM-T pressure-sensing treadmill in a standardized biomechanics laboratory. The lower extremity kinematic and kinetic parameters were measured at every 10 km (0 km, 10 km, and 20 km) and subsequently processed using Visual3D and simulation musculoskeletal modeling. We used a one-way repeated measures ANOVA to determine the main effect of running distance on the outcome variables. Results: During the running stance phases, contact time and step frequency significantly increased from 10 km to 20 km ( Conclusion: As the running distance increases, the running mechanism is significantly altered. The cumulative loading on the knee and hip significantly increased, indicating a shift in the compensatory mechanism from the proximal to the distal joint. Cumulative loading on the AT and PFJ increased with the accumulated running distance, which directly reflects that prolonged running might cause greater cumulative loading on the lower extremity.
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