The effects of conventional and oval chainrings on patellofemoral loading during road cycling: an exploration using musculoskeletal simulation

Abstract

The aim of the current investigation was to utilize a musculoskeletal simulation approach to resolve muscle forces during the pedal cycle, to specifically examine the effects of chainring geometry on patellofemoral loading during cycling. 15 healthy male recreational cyclists rode a stationary cycle ergometer at a fixed cadence of 70 RPM in two chainring conditions (round and oval). Patellofemoral loading was explored using a musculoskeletal simulation and mathematical modeling approach. Differences between chainring conditions across the entire pedal cycle were examined using one-dimensional statistical parametric mapping, and patellofemoral force experienced per 20 km was explored using a paired samples t test. No significant (P > 0.05) differences in patellofemoral force or stress were found throughout the pedal cycle between chainring conditions. It was also shown that no significant (P > 0.05) differences in patellofemoral force per 20-km joint were evident (round 38,576.40 N/kg s and oval = 35,637.00 N/kg s). The current analysis found no effects of chainring geometry, on the forces experienced by the patellofemoral joint during the pedal cycle.