A portable balancing device is formed from a pair of modules connected by a width-adjusting mechanism. Each module may also be referred to as half of the pair of modules. Each module is formed from an upper platform and a lower platform. The upper and lower platforms are separated by compressible elements that deform under a user's weight.

In one example, a muscle exercise device includes a first arm, a second arm rotatably connected to the first arm, and the second arm and first arm configured to cooperatively define a recess. The muscle exercise device also includes a resistance element configured to reside in the recess and be compressed between the first arm and the second arm, and a wireless transmitter disposed in either the first arm or the second arm, wherein the wireless transmitter is responsive to communications from an app residing on a user device.

An exercise device 90 may comprise a pair of handle tube assemblies 100 in slideable attachment to a center tube assembly 200 such that the handle tube assemblies move in opposition with resistance sometime proved by an elastic member housed within the center tube and with resistance and/or damping provided the controlled flow of air within the apparatus. A handle tube assembly may comprise a handle tube 104 containing a resistance plug 101 in frictional attachment to a outer cap 103, plug seal 107 and other components. A center tube assembly may comprise, at either end, a return bumper 201, low friction linear bushing 202, center cap 203, extend bumper 205 and other components.

Hand held weight units of light weight manufactured as a solid unit, a shell unit with core insert combinations or modular units with interlocking ends. Shell units with core inserts and modular interlocking units allow for the changing of held weight by inserting or removing inserts or by locking or unlocking of modular weight unit sets creating varying held weight. The weight units are primarily used with upper body exercises during aerobic exercises in the home, outdoors, or in a gym setting such as walking or running to vary the intensity of workout during use.

An exercise device may include: a first element having a longitudinal center axis; a second element having a first end movably connected to the first element via a connection device; and a second, free, end; and a pre-tensioned force resistance device connected to the first or second elements. The exercising device may be configured to be in an initial state, in which the second end is provided with a first distance (Di) from the longitudinal center axis. The exercising device may be configured to be in a compressed state, in which the second end is provided with a second distance (Dc) from the longitudinal center axis, where the second distance (Dc) is shorter than the first distance (Di). The pre-tensioned force resistance device may be configured to force the second end of the second element towards the initial state.

An exercise apparatus includes a first cord, a second cord, and an adjustment mechanism. The first cord is pullable from and retractable around a first pulley. The second cord is pullable from and retractable around a second pulley. The adjustment mechanism allows for adjusting a pull-out tension provided by the first cord independently of a retraction tension provided by the first cord. The pull-out tension provided by the first cord is a tension provided by the first cord when the first cord is pulled from the first pulley. The retraction tension provided by the first cord is a tension provided by the first cord when the first cord is retracted around the first pulley.

A wobble board includes a platform, a base having a generally flat bottom surface, and at least one compressible member positioned intermediate the platform and the base such that the platform is pivotable with respect to the base.

An oral device includes an intraoral bolus simulator comprising an exterior surface and having an interior volume Tillable with a fluid. An extraoral user interface extends from the bolus simulator, and can be used to locate or position the intraoral bolus simulator. In various embodiments, the fluid may be a gas or a liquid, or combinations thereof. In other embodiments, an oral device includes an extraoral handle, a shield connected to the handle, a tether extending from the shield, and a bolus simulator connected to the tether.

Training apparatuses configured to receive, and conform to, the back of a user's knee and provide varying resistance and tactile feedback to a user performing quadriceps exercises and methods for using such apparatuses are disclosed herein. A preferred embodiment of the training apparatuses for quad sets comprises a solid, deformable, resilient body that includes a non-skid base and a top surface with a recess configured to receive the back of a user's knee. The body of this embodiment is preferably made of open-cell polyurethane foam with a uniform density ranging between 1 lb/ft.sup.3 and 8 lbs/ft.sup.3, and more preferably between 1.5 lbs/ft.sup.3 and 4.5 lbs/ft.sup.3. The embodiment provides gradually increasing resistance to compression, e.g. tactile feedback to the user's knee, when the user increasingly pushes his/her knee down against the embodiment, and thus allows dynamic quad setting and strengthening.

A device for movement and resistance training of the lower extremities is disclosed which helps prevent muscle de-conditioning and deep vein thrombosis from lack of movement resulting in venous stasis and potential development of blood clot formation. The device includes footpads with spring resistance and sensors that register the number of times the pads are depressed and the amount of force applied by a user to the footpads. Data from use of the device may be stored and provided as feedback to the user so the user can monitor progress in using the device.