We recommend you do not expose your Training Sticks to prolonged extreme temperatures as this may compromise the structural integrity of the sticks. Do not leave your Training Sticks inside your vehicle in very hot temperatures as this can cause unwanted bending of the sticks if the sticks are on an angle. Store them flat or vertically in very hot temperatures. Store your Training Sticks either upright or if horizontal support the stick at each end and in the middle to avoid potential bending over time. When flexing the Training Stick, such as in the Bow & Arrow drill, we recommend spinning the stick after each rep so you don’t always bend the stick in the same direction to maintain the stick’s shape over time. One objective with Stick Mobility exercises (e.g. the bow & Arrow drill) is to create tension by flexing the stick. Excessive over-flexion is not part of the training exercises and not required to achieve the benefits of the system. Although rare, excessive over-flexion of the stick can result in stick damage and breakage. Please follow the flexion examples from our training videos and/or the guidance of a Certified Stick Mobility Instructor.