In a proof-of-principal study , using a cross-over design , seven healthy subjects received in separate sessions : ( 1 ) TMS ( 120 % of the resting motor threshold-RMT , optimal site for Flexor Carpi Radialis ) with muscle at rest ; ( 2 ) TMS paired with cyclic passive movement during extension cyclic passive movement ( 400 pairs , 1 Hz ) , with the intervention order randomly assigned .