Fig. 2 | Scientific Reports

Fig. 2

From: Greater muscle electrode distance and fat mass affect motor units identification from high-density surface EMG in the vastus lateralis muscle

Fig. 2

Correlation between whole-body FM% and the number of identified MU across all target forces. On the top, correlations between whole-body FM% estimated by BIA at 15% (a), 35% (b), 50% (c), and 70% MVF (d). On the bottom, correlations between whole-body FM% estimated by DXA at 15% (e), 35% (f), 50% (g), and 70% MVF (h). Each point within the plot represents the number of identified MU per participant. The black trendlines highlight the direction of the correlation. Specifically, the higher the FM%, the fewer the number of MU that can be accurately detected. FM: fat mass; BIA: bioelectrical impedance analysis; DXA: dual-energy X-ray absorptiometry; rs: Spearman correlation index; Y: young adults; O: older adults.

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