Used to get my subbie to mount a special saddle on the excercise bike (yes your right, it had a large dildo attached to it) she was the locked onto the bike at the pedals/feet handlebars/ hands and saddle/waist and thighs, then locked into a heay mask that covered her eyes.

She was then told that she had x minutes to pedal x miles...and that she would receive 1 stroke of the cane on her bare tits for each 50 yards she was under at the end if the session, naturally the tension setting on the bike was changed each session and the distance/time relationship was altered. Not only did the cane treat urge her to work extra hard.......but also gave me a wondrous sight to look at as she pedalled away.....well worth trying guys