A mobility vehicle includes a personal mobility vehicle having at least one wheel body and a power-assisting system. The mass flow meter has at least two measuring elements immersed into a vessel with a flowing medium, with one of the measuring elements being heated. The hydraulic fluid transmission unit is structured to communicate a hydraulic fluid to the hydraulic fluid conduit in response to movement of the brake operating member. A portion of the edges may have a concave configuration, or the edges may have both concave and convex configurations. Further, the lower portion of the ankle support is attached to the interior of the footwear, thus allowing the wearer’s ankle to be supported by both the footwear and the ankle support, therefore efficiently supporting the ankle, even when large shocks are applied to the ankle due to intense activity. A drive belt extends around and engages both the drive pulley and the generator pulley.