Abstract: This invention relates to a bicycle crankshaft lock comprising a lock engageable with the crankshaft of a bicycle, the bicycle crankshaft rotatable when the lock is moved to a crankshaft non-engaged position, the lock inoperative condition, and the bicycle crankshaft non-rotatable when the lock is moved to a crankshaft engaged position, the lock operative condition, and an actuator is connectable to the lock and operable to engage the lock with the crankshaft between the inoperative and operative conditions, the actuator being hand operable by a user.

Abstract: Physical interaction apparatus which includes a wall and a floor presenting a surface of a hook or loop component of a hook and loop fastening system. Also provided is at least one interface that may include a glove, footwear and sports implements which includes an outer surface presenting the other hook or loop component of the hook and loop fastening system. Each interface can be selectively and releasably attachable by a person wearing such, to the surface of the wall and floor and allow the person to apply an action force countered by the wall or floor in a reactionary manner.

Abstract: A physical interaction device which includes a wall and a floor presenting a surface of a hook or loop component of a hook and loop fastening system. Also provided is at least one glove and at least one piece of footwear which includes an outer surface presenting the other hook or loop component of the hook and loop fastening system. Each of the glove and piece of footwear can be selectively and releasably attachable by a person wearing such, to the surface of the wall and floor to thereby immobilize the hand or foot and allow the person to apply an action force countered by the wall or floor in a reactionary manner.

Abstract: A physical interaction means comprising a wall including an outwardly presented surface of one of a hook component and loop component of a hook and loop fastening system. Also provided is at least one glove with an outer surface including the other one of the hook component and loop component of the hook and loop fastening system to be selectively and releasably attachable by a person who may wear the glove to the surface of the wall to thereby immobilise the hand and allow the person to apply an action force which is countered by the wall in a reactionary manner.