Abstract: A apparatus or system defined by a handheld exercise device that includes a weighted body; a handle arranged along a radial axis of the weighted body; and a connector that creates at least one connection between each radially distal end of the handle and a component of the weighted body. The handheld exercise device, in use, minimizes one or more peak forces and rotational inertia acting on a forearm of a user actively engaging the handheld exercise device in motion.

Abstract: A hand weight includes a chassis including a handle portion configured to be grasped by a user such that a forearm of the user extends along an axis, and a flexible element attached to the chassis. The hand weight can be configured to receive a movable mass, and the flexible element can be configured to at least partially support the movable mass such that the movable mass forms at least part of a sprung mass of a hand weight assembly including the hand weight and the movable mass, the sprung mass configured to move relative to the chassis of the hand weight and deform the flexible element in response to a force in a direction along the axis applied to the handle portion by the user while grasping the handle portion.

Abstract: An apparatus or system defined by a handheld exercise device includes a weighted body; a handle arranged along a radial axis of the weighted body; and a connector that creates at least one connection between each radially distal end of the handle and a component of the weighted body. The handheld exercise device, in use, minimizes one or more peak forces and rotational inertia acting on a forearm of a user actively engaging the handheld exercise device in motion.