The effect of saddle height on oxygen consumption during bicycle ergometer work.

The effect of saddle height upon oxygen consumption during bicycle ergometer work was measured. Five subjects were tested on a continuous work protocol from 50 watts to 200 watts in 25 watt increments at experimental saddle heights of 100%, 103%, 106%, 109%, and 112% of inside leg length measured from the ischium to the floor. Data were recorded on Vo2, Vco2, VE, and heart rate. It was found that Vo2 progressively increased as saddle height increased; the highest Vo2 occurred at the highest experimental setting of 112%; the most effective saddle positions in the experiment as measured by lowest Vo2 per unit of work were 100% and 103%; and there was no significant difference between the VO2 AT 100% AND 103%. It was concluded that in light of our data and earlier data showing power output to be maximized at 104% (by our measurement method), the saddle height of choice should be approximately 103% to 104% of leg length. A convenient and objective method for setting seat height is presented.