Prophylactic Ankle Research Articles

Effects of prophylactic ankle and knee braces on leg stiffness during hopping.

During human movement, the leg can be represented as a mechanical spring, with its stiffness potentially contributing to sports performance and injury prevention. Although many individuals perform athletic activities with joint stabilizers, little is known about the effects of prophylactic lower extremity braces on leg stiffness. The objective of this study was to investigate the effect of ankle and/or knee braces on leg stiffness measured during one-legged hopping at a range of frequencies. Thirteen male participants performed one-legged hopping with their dominant leg at frequencies of 2.2, 2.6, and 3.0 Hz. All participants were randomly tested under the following four brace conditions: 1) no brace (control), 2) prophylactic ankle brace, 3) prophylactic knee brace, and 4) prophylactic ankle and knee braces. Based on a spring–mass model, leg stiffness was calculated using data from an accelerometer. It was found that leg stiffness increased with increasing hopping frequency for each brace condition. However, there were no significant differences in leg stiffness among the four brace conditions at the three hopping frequencies. Since some level of leg stiffness is needed for optimal athletic performance and training, these results suggest that ankle and knee braces do not significantly interfere with dynamic hopping activities.

Lower Extremity Kinematics and Ground Reaction Forces After Prophylactic Lace-Up Ankle Bracing

Lower Extremity Kinematics and Ground Reaction Forces After Prophylactic Lace-Up Ankle Bracing

Boot-top Fracture in a Volleyball Player Using a Prophylactic Rigid Ankle Support

Boot-top Fracture in a Volleyball Player Using a Prophylactic Rigid Ankle Support

Role of Prophylactic Knee and Ankle Bracing in Injury Reduction

Knee and ankle injuries continue to be ever present at all levels of athletic participation. A relatively recent approach in injury intervention is the use of prophylactic knee braces (PKB) and ankle stabilizers (AS). Prophylactic braces are used to reduce the frequency and severity of injuries in a cost effective manner, but their clinical efficacy has been questioned. Specific to PKB, there is little agreement among the results of studies completed to date as to their effectiveness in reducing the incidence of knee injuries. This is attributed to a lack of control of confounding variables that mitigate the interpretive findings of many studies. Although the clinical research regarding AS is limited, it appears that they are effective in reducing the incidence of acute ankle injuries. Recommendations for future study as well as considerations for clinical research analysis are presented.