Aspects relate to a portable device that may be used to identify a critical intensity and an anaerobic work capacity of an individual. The device may utilize muscle oxygen sensor data, speed data, or power data. The device may utilize data from multiple exercise sessions, or may utilize data from a single exercise session. The device may additionally estimate a critical intensity from a previous race time input from a user.

An elongate strap support system for anatomical support, pain reduction, or therapeutic treatment includes a package containing a first elongate strap support and at least one additional elongate strap support. In one example, the first elongate strap support includes a woven fabric support layer including synthetic fibers. The woven fabric is shaped so as to form an elongated strap with rounded portions. The woven fabric is substantially resistant to stretching in one direction under such test conditions as those specified in ASTM D3759. The first elongate strap support additionally includes an adhesive layer on the support layer for adhesive attachment of the woven fabric support layer to an outer skin surface of a body and a removable cover layer on the adhesive layer.

A trim to fit insole for insertion into a shoe has a raised metatarsal pad on the insole upper surface, wherein the raised metatarsal pad has a first region rising at a slope inboard from a medial edge of the insole board, and configured to underlie the first metatarsal head of the wearer, a second, raised top surface region configured to underlie the second to fourth metatarsal shafts of the wearer, and a third region sloping downward towards the lateral edge of the insole configured to underlie the fifth metatarsal shaft of the wearer, wherein all three regions cooperate to evert the first metatarsal and to invert the fifth metatarsal of the wearer.

A trim to fit insole for insertion into a shoe has a raised metatarsal pad on the insole upper surface, wherein the raised metatarsal pad has a first region rising at a slope inboard from a medial edge of the insole board, and configured to underlie the first metatarsal head of the wearer, a second, raised top surface region configured to underlie the second to fourth metatarsal shafts of the wearer, and a third region sloping downward towards the lateral edge of the insole configured to underlie the fifth metatarsal shaft of the wearer, wherein all three regions cooperate to evert the first metatarsal and to invert the fifth metatarsal of the wearer.

A plurality of orthotic systems are provided. One bi-layer system is constructed from a single sheet of fabric that is molded into two layers. One tri-layer system includes a base layer; a mid-layer, and an upper layer. The upper layer is joined to the mid-layer and the mid-layer is joined to the base layer. The coupling of the base layer, the mid-layer and the upper layer create a rear spring section, a mid-spring section and a front spring section in which the upper layer is suspended over the mid-layer and the heel portion is suspended on the proximal heel end of the base layer.

A plurality of orthotic systems are provided. One bi-layer system is constructed from a single sheet of fabric that is molded into two layers. One tri-layer system includes a base layer; a mid-layer; and an upper layer. The upper layer is joined to the mid-layer and the mid-layer is joined to the base layer. The coupling of the base layer, the mid-layer and the upper layer create a rear spring section, a mid-spring section and a front spring section in which the upper layer is suspended over the mid-layer and the heel portion is suspended on the proximal heel end of the base layer.

A boot includes a rigid outer shell including a base portion adjacent to a portion of a foot of a subject, a leg portion adjacent to a portion of a leg of the subject, and an ankle support portion integral with and coupling the base portion of the main body with the leg portion of the main body, the ankle portion of the main body being adjacent to two opposing sides of an ankle of the subject, the ankle support portion of the main body having one or more removable elements. A first one of the one or more removable elements, adjacent to a first one of the two opposing sides of the ankle, is configured to be removed from the rigid outer shell to aid in preventing contact between an incision area on the first side of the ankle of the subject and the rigid outer shell.

A boot includes a rigid outer shell including a base portion adjacent to a portion of a foot of a subject, a leg portion adjacent to a portion of a leg of the subject, and an ankle support portion integral with and coupling the base portion of the main body with the leg portion of the main body, the ankle portion of the main body being adjacent to two opposing sides of an ankle of the subject, the ankle support portion of the main body having one or more removable elements. A first one of the one or more removable elements, adjacent to a first one of the two opposing sides of the ankle, is configured to be removed from the rigid outer shell to aid in preventing contact between an incision area on the first side of the ankle of the subject and the rigid outer shell.

An article of footwear has an upper, an outsole attached to the upper, and a midsole. The outsole includes a ground-engaging surface and an inner surface disposed on opposite sides. The midsole has a footbed and a bottom surface disposed on opposite sides. The bottom surface opposes the inner surface to define a cavity therebetween. The article of footwear also includes a first series of projections extending into the cavity from one of the inner surface and the bottom surface in a first direction toward the other of the inner surface and the bottom surface. The article of footwear also includes a second series of projection extending into the cavity from one of the inner surface and the bottom surface in the first direction toward the other of the inner surface and the bottom surface. The article of footwear also includes a quantity of particulate matter disposed within the cavity.

An insole having, a base layer, a top layer fixedly secured to the base layer, a middle layer comprised of the base layer and the top layer positioned between the base layer and the top layer, a pressure projection extending upwardly from within the middle layer and extending past an upper surface of the upper layer, the projection including a disc fixedly secured within the middle layer, an annular ring fixedly secured atop the disc, a circular metal insert fixedly secured atop the disc within the annular ring, the circular metal insert having a horseshoe-shaped aperture therein. The insole may also include projections either positioned proximate an inside arch and/or positioned proximate an outside arch. The insole may also comprise a projection positioned proximate to a midfoot region.