Treadmill

A treadmill comprising:

• a base frame;
• a treadmill belt rotatably mounted on the base frame, capable of being rotated around the base frame in circulation, being a loop, and including
• an upper section having two ends;
• a lower section having two ends;
• and
• two end sections, each one of the end sections connected between a respective one of the two ends of the upper section and a respective one of the two ends of the lower section;
• and
• multiple bearing wheels mounted on an inner surface of the treadmill belt, and each one of the bearing wheels inclined relative to a horizontal plane;
• and
• a bearing frame mounted on the base frame, corresponding to the bearing wheels, and supporting the bearing wheels of the upper section of the treadmill belt;
• and
• a limiting frame mounted on the base frame, disposed on sides of the bearing wheels, and being capable of abutting wheel surfaces of the bearing wheels to limit the treadmill belt from moving transversely relative to the base frame.