my senei has encouraged us to do the rowing exersize for 40minutes. which i have tried to do but got board! what is it that i am trying to achieve with this exersize. when i ask sensei is obscure, "you wont know till you have done it!". fair enough i suppose. but i don't even know how whether i am doing it right. i keep loosing balance slightly every 4th or 5th cycle or so. i take it i have to concentrate on moving from the centre/hips?