Table 1.

Normalized EMG activity during upright stance

Subject group	SOL (% MVC)	GM (% MVC)	GL (% MVC)	TA (% MVC)
Young (n = 5)	11.8 ± 6.8	10.3 ± 6.2	10.4 ± 5.4	3.1 ± 1.9
Elderly (n = 5)	24.9 ± 4.2*	25.8 ± 9.8*	18.6 ± 8.3	8.6 ± 4.5*

The rectified and averaged EMG (aEMG) normalized to maximal aEMG measured during isometric maximal voluntary contractions (MVCs) of the plantarflexor and dorsiflexor muscles for the soleus (SOL), gastrocnemii medialis (GM) and lateralis (GL) and tibialis anterior (TA) muscles. Data are means ± SD.

^*Significant differences between age groups, P < 0.05.