This study explored the contribution of plantar cutaneous inputs induced by a spike support surface to balance control in 19 elderly and 19 young participants. Participants stood or walked in spike sandals for 5 mins. A control period with no spikes was used with both groups. In all conditions postural responses were assessed using a closed eyes condition on a force plate platform and the fine touch sensitivity of all participants’ soles of feet was tested. Measures were taken immediately on wearing the spikes and 5 mins after wearing them. Significant changes in postural control were found after 5 minutes with the elderly participants showing a significant improvement in steady stance. Longitudinal measures were not taken so it is not clear how long this change would have been carried over. No significant changes were found in the fine touch sensitivity of the foot soles after 5 minutes standing on spikes so it is unclear how the change in postural control was mediated. The authors hypothesised that the sensitivity testing used in the study was sensory ending specific and that the change in standing stability were controlled by the other cutaneous receptors. Further research is needed to assess the effects of longer and discontinuous stimulations with spike insoles on postural control.
