140487.fig.002a
(a)
140487.fig.002b
(b)
140487.fig.002c
(c)
140487.fig.002d
(d)
Figure 2: Four different models of swimmer’s hand: (a) —with thumb adducted; (b) —with thumb abducted; (c) —with spread all fingers; (d) —with spreading fingers and thumb adducted.