Fig. 8.

An image of a vials’ rotation on an exercise device. (A) For young and adult flies vials were vertically loaded in exercise device, and rotated 180° to make flies constantly climb (just as Power Tower, overcoming weight = total body weight). (B) For aged flies vials were loaded in the exercise device, and their long axis is at an angle of 45° to the horizontal plane (overcoming weight = total body weight xsin45°). When aged flies climbed and reached the top of vial, the vial were rotated 90° to make flies constantly climb.