Abstract: The disclosure relates to a trampoline that has a circumferential frame and a bounce mat, which has numerous hooks. The hooks each have at least one receiver that is bordered on one side by a side wall. A cord ring with a joint is placed in each receiver in order to attach the bounce mat to the circumferential frame. The side wall has a first recess in which the joint engages. The joint is retained in the hook by the recess such that the cord ring does not slip while the trampoline is being used.

Abstract: The present disclosure provides a foldable horizontal bar. The foldable horizontal bar may include a horizontal bar; a pair of supports configured to support the horizontal bar; and a pair of bases. Each base may include a first movable part, a second movable part, and a fixed part. The fixed part may be mechanically connected with the first movable part and the second movable part. The first movable part may be rotatable around a first connection point between the fixed part and the first movable part within a preset angle. The second movable part may be rotatable around a second connection point between the fixed part and the second movable part within the preset angle. The preset angle being larger than 90 degrees.

Abstract: An exercise device includes a lower base and an upper platform with a support frame extending angularly therebetween. The angularly extending support frame extends between the lower base and the upper platform at an angle sufficient to allow for a user to position their body in a generally vertical plank position and hold their body in a straight line, angled relative to the floor between approximately 85 degrees to approximately 75 degrees. An exercise system may include a discrete upper platform and a discrete lower plank positioning platform, each of which are removably mountable to a support frame. The support frame, for example, may be a part of another exercise device or may be a discrete stand-alone support frame specifically configured for exercise system.