US 11,745,049 B2
Exercise devices for muscle isolation
Doniphan T. Stone, Aurora, CO (US); and Jeffrey D. Huling, Denver, CO (US)
Assigned to CoreFirstX, LLC, Aurora, CO (US)
Filed by COREFIRSTX, LLC, Aurora, CO (US)
Filed on Dec. 17, 2020, as Appl. No. 17/125,944.
Application 17/125,944 is a continuation in part of application No. 16/543,771, filed on Aug. 19, 2019.
Claims priority of provisional application 62/720,291, filed on Aug. 21, 2018.
Prior Publication US 2021/0101045 A1, Apr. 8, 2021
Int. Cl. A63B 21/00 (2006.01); A63B 71/00 (2006.01)
CPC A63B 21/4017 (2015.10) [A63B 71/0054 (2013.01); A63B 2071/0072 (2013.01); A63B 2209/00 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An exercise device configured to couple a user's limb to a resistance mechanism and to tighten on the user's limb by a force applied in opposition to the resistance mechanism, the device comprising:
a strap including a first portion, a second portion, and a third portion, the strap defining a first closed loop shape providing an adjustable opening configured to receive the user's limb,
a second closed loop shape coupled to the strap at a first location and wherein the second portion and the third portion of the strap are attached to a third closed loop shape configured for coupling to the resistance mechanism for application of force from the user's limb to the resistance mechanism;
a fixed opening provided by the second closed loop shape coupled to the strap,
wherein the adjustable opening of the strap is formed by passing the second portion of the strap through the fixed opening, the second portion of the first strap being movable within the fixed opening, wherein the adjustable opening is configured to tighten on the user's limb by the force applied in opposition to the resistance mechanism, and wherein the first location where the second closed loop shape is coupled to the strap determines a minimum size of the adjustable opening, wherein the minimum size of the adjustable opening is sized to accommodate the user's limb; and
a flexible material coupled to the strap, wherein the flexible material provides the second closed loop shape and the fixed opening, and wherein the flexible material defines a tube and the strap is at least partially disposed within the tube, and wherein the tube defines a first major opening and a second major opening and a channel therebetween, and the strap passes through the channel, and wherein the tube defines a slit opening to the channel, and wherein the adjustable opening is formed by the strap extending through the slit into the channel and out through the second major opening.