An assembled front housing of a treadmill includes a panel, a first side casing and a second side casing respectively laterally connected to two opposite sides of the panel for covering a drive device and a lifting device of the treadmill. The apparatus includes a substrate. Hair is protected against color loss, heat, humidity, chemicals, and frizz while shine, smoothness, and manageability are increased. The method comprises the steps of: determining whether the cell edge user is able to operate the MD technology; processing the fast dynamic selection of the FFR technology and the MD technology for the cell edge user, and the selection is made based on a instantaneous link Signal Quality Index ; and allocating the center subband or the edge subband to the cell edge user according to the selection. In preferred embodiments, the upstream and downstream functions are synchronized using a Global Positioning System reference source.