Abstract des Autors

In this study, we compare differences between the mid-foot running gait of a typical middle distance runner and the footpath of a non-impact elliptical cross-training device. From this analysis, we propose and implement an asymmetric ovate footpath to overcome the substantial differences in biomechanics imposed by elliptical mechanisms. Similar to running, the asymmetric ovate provides 60% swing and 40% stance phase timing as well as an elevated foot position during initial swing at the commencement of foot recovery. Importantly, this reduction of mid-stance to toe-off timing combined with a large arc in the footpath during initial swing induces a simulated leap (double float) even though the feet remain in contact with the pedals. Preliminary analysis comparing the asymmetric ovate with an elliptical footpath (n = 2 × 3 replicates) suggests that the asymmetric ovate is better suited to high-intensity interval training. Applying a 99% confidence level, maximum heart rates were higher and achieved faster using the asymmetric ovate mechanism. While non-impact cross-training mechanisms are by definition different to running, our investigation suggests that the asymmetric ovate provides a closer analogue to running than the ellipse. Future studies are needed to confirm these findings.