Table 2.

Group data of the untrained left hand (LH) pre and post training phase as well as of the trained right hand (RH) during training phase (trials T1–T10) in the ball-rotation task.

	LH_pre	T1	T2	T3	T4	T5	T6	T7	T8	T9	T10	LH_post
MG n = 17	31.82 ± 2.94	23.00 ± 4.43	27.94 ± 4.47	33.00 ± 4.37	36.41 ± 3.46	36.35 ± 3.62	39.24 ± 3.23	40.71 ± 3.37	43.29 ± 3.25	43.82 ± 3.15	45.94 ± 3.14	41.47 ± 3.17
CG n = 18	35.33 ± 3.01	35.83 ± 2.37	39.06 ± 2.86	39.22 ± 3.09	40.78 ± 2.73	43.67 ± 3.28	44.33 ± 3.06	44.50 ± 3.36	45.00 ± 3.45	47.67 ± 3.49	46.00 ± 3.35	39.61 ± 2.80

Behavioral data for the untrained LH and trained RH (ball-rotations/min). Participants in the MG received MVF during training phase (T1–T10), while participants in the CG watched their resting untrained LH during training phase. Performing the ball-rotation task during training phase (T1–T10) resulted in significant performance gains of the untrained LH as well as trained RH in both groups, while there was a significant higher amount of performance improvement in both hands in MG. For details, see text. Data are depicted as mean ± standard error of the mean.