Abstract: A core resistance apparatus is provided. The core resistance apparatus is comprised of a rotational adjusting element having a rotational member and a first and a second rotational cord guide. The first and second rotational cord guides pivotally contact a first and a second side portion of the rotational member along a contacting means, respectively. The core resistance apparatus is comprised a first and a second resistance cord. The resistance cords each have a first and second attachment point, wherein the first and second rotational cord guides slidingly connect with the first and second resistance cords, respectively. The core resistance apparatus is comprised of a first and a second upper body connector, and a third and a fourth lower body connector. The upper and lower body connectors attach to a user, wherein the location of the rotational adjusting element adjusts to a center of gravity relative to the user movement.

Abstract: A bass drum system and method is provided. The bass drum system is comprised of a bass drum including at least one connector and an anchoring harness. The anchoring harness includes at least one first securing point, an anchoring body, and at least one second securing point. The at least one first securing point is connected to the anchoring body at a predefined distance from the at least one second securing point, also connected to the anchoring body. The at least one first securing point attaches to the at least one connector of the bass drum and the anchoring body contacts a seat structure used by a musician. The at least one second securing point attaches to the at least one connector.