Abstract: Systems, devices, and methods are described for providing, among other things, an electrodynamic contactless braking system. In an embodiment, the electrodynamic contactless braking system may include plurality of electromagnet assemblies arranged and configured to have alternating magnetic field orientations. In an embodiment, each electromagnet assembly may include an air gap formed between a first electromagnet pole and a second electromagnet pole. In an embodiment, each electromagnet assembly is configured to generate a magnetic field of a character and for a duration sufficient to induce eddy currents on an electrically-conductive element moving within the air gap of each of the plurality of electromagnets. In an embodiment, the electrodynamic contactless braking system may include a controller operatively coupled to each of the plurality of electromagnets, the controller configured operate the plurality of electromagnets in parallel.

Abstract: Systems, devices, and methods are described for providing, among other things, a neck and spine strengthening device. The strengthening device includes a spinal resistance assembly configured to apply a resist force or to resist rotation about at least a first axis, and a head affixing assembly configured to secure to a head of a user during use. The strengthening device is instrumented with sensors and an embedded computing system configured to securely exchange exercise performance and configuration data with local client devices, and to monitor and record exercise activity and exercise performance data.

Abstract: Systems, devices, and methods are described for providing, among other things, a neck and spine strengthening device. In an embodiment, the neck strengthening device includes a spinal resistance assembly including at least one resistance component configured to apply a resist force or to resist rotation about a first axis. In an embodiment, the spinal resistance assembly permits lateral neck rotation of a user about the first axis while substantially limiting flexional and extensional movement. In an embodiment, the neck strengthening device includes a device securing assembly configured to physically anchor the device to an anchoring structure. In an embodiment, the neck strengthening device includes a head affixing assembly configured to secure to a head of a user during use.