Synergistic Parameters of Motor Adaptation in Variable Resistance Cycling Activities

Muscle synergies are a promising assessment tool in motor rehabilitation. In this study, we propose a basic experimental framework with minimum instrumentation and experiment duration for the evaluation of muscle synergies that can be easily translated to clinical application. To that end, we analyze synergistic parameters in cycling activities under different force constraints by modifying the resistance level of a stationary bike. Results suggest that the contribution of specific motor primitives changes with resistance as a result of motor adaptation to greater physical effort. In addition, we observe changes in the contribution of the different muscular groups, particularly the muscles of the posterior chain. These are interesting findings that are likely to be altered in patients with pathological motor conditions and thus can potentially serve as clinical biomarkers.