Abstract: Disclosed herein is a portable exercise storage apparatus, comprising: a rigid hollow tube comprising a first end and a second end; a first end cap that is configured to removably close the first end; and at least one strap releasably connected to the first end and the second end.

Abstract: Disclosed herein are tether lines comprising a handle; a grapple, comprising a body, two stationary arms, and a swing arm configured to rotate around a pivot point in between the stationary arms; and a cable connecting the handle with the grapple. Also disclosed are methods of temporarily restraining an athlete, the methods comprising providing a tether line comprising a handle; a grapple, comprising a body, two stationary arms, and a swing arm configured to rotate around a pivot point in between the stationary arms; and a cable connecting the handle with the grapple; connecting the grapple to the athlete; and applying pressure to a release trigger on the handle, thereby causing the swing arm to swing open, thereby disconnecting the athlete from the grapple.