Described herein is a modular skate system that includes at least one modular skate component comprising a major surface, a core comprising a body formed from a first material, an outer layer formed from a second material, the outer layer surrounding at least a portion of the core, wherein the first material is different from the second material, and wherein the major surface comprises the outer layer.

An exercise apparatus, system, and method include a board with adjustable bumpers having shock-absorbing systems and user-adjustable bumper push-off angles. A counterforce and guiding system, providing an amount of counterbalance force corresponding to an amount of force by an amount of a user lean during a sliding motion, while simultaneously providing an amount of a guiding force from a harness not affixed statically to a user allowing a gliding motion along a path, with a guideline to guide an amount of a user motion to correspond to user-selected path of motion on the top sliding surface as the user slides, that results in the user to simulate, a body dynamic of a naturally occurring posture and motion of a human's body optimized for performing the motion that corresponds to the user-selected path of motion.

An exercise apparatus, system, and method includes a board with adjustable bumpers having shock-absorbing systems and user-adjustable bumper push-off angles. A counterforce and guiding system provides an amount of counterbalance force corresponding to an amount of force by an amount of a user lean during a sliding motion, while simultaneously providing an amount of a guiding force from a harness not affixed statically to a user. This allows for a gliding motion along a path, with a guideline to guide an amount of a user motion corresponding to a user-selected path of motion on a top sliding surface as the user slides. This results in the user simulating a dynamic of a naturally occurring posture and motion of a human body optimized for performing the gliding motion corresponding to the user-selected path of motion.