Abstract: A combined treadmill and seat assembly includes a portable treadmill, and a portable seat assembly detachably connected to the treadmill such that the seat assembly is selectively disposed between first and second positions while connected to the treadmill. The seat assembly includes first and second seats oriented at oppositely facing axial directions so that the first seat extends towards the treadmill while the second seat extends away from the treadmill. Advantageously, the treadmill platform is registered along a first plane when the seat assembly is positioned at the first position and, the treadmill platform is registered along a second plane when the seat assembly is positioned at the second position. Notably, the first and second planes are horizontally oriented and coplanar such that the treadmill platform remains equidistantly spaced from a ground surface when the seat assembly is situated at the first and second positions respectively.