Fig. 1.

Illustrations of the functional reach (a) and up-and-reach (b) tasks. The finger-finger distance (A) is defined as the finger displacement from position 1 to position 2 in Fig. 1a, and from position 2 to position 3 in Fig. 1b, respectively. The finger-toe distance (B) is defined as the distance between finger and toe in the final position for both conditions