In a common test for cardiac function (the stress test), the patient walks on an inclined treadmill

Question:

In a common test for cardiac function (the "stress test"), the patient walks on an inclined treadmill (Fig. 6-46). Estimate the power required from a 75-kg patient when the treadmill is sloping at an angle of 12Â° and the velocity is 3.1 km/h (How does this power compare to the power rating of a light bulb?)