Lower body predictors of glenohumeral compressive force in high school baseball pitchers.

The purpose of this study was to better understand how lower body kinematics relate to peak glenohumeral compressive force and develop a regression model accounting for variability in peak glenohumeral compressive force. Data were collected for 34 pitchers. Average peak glenohumeral compressive force was 1.

PPD-QALY-an index for cost-effectiveness in orthopedics: providing essential information to both physicians and health care policy makers for appropriate allocation of medical resources.

Because of the increasing health care costs and the need for proper allocation of resources, it is important to ensure the best use of health benefits for sick and injured people of the population. An index or indicator is needed to help us quantify what is being spent so that comparisons with other options can be implemented. Cost-effective analysis seems to be well suited to provide this essential information to health care policy makers and those charged with distributing disability funds so that the proper allocation of resources can be achieved.

Cost-effectiveness in orthopedics: providing essential information to both physicians and health care policy makers for appropriate allocation of medical resources.

Cost-effective analysis has become an important tool in helping determine what procedures are both cost-effective and appropriate in today's cost control health care. The quality-adjusted life-year (QALY) is a standard measure for health-related quality-of-life in medical cost-effectiveness research. It can be used to compare different interventions to determine the cost-effectiveness of each procedure.

A biomechanical model correlating shoulder kinetics to pain in young baseball pitchers.

Previous work has postulated that shoulder pain may be associated with increases in both peak shoulder anterior force and peak shoulder proximal force. Unfortunately these relationships have yet to be quantified. Thus, the purpose of this study was to associate these kinetic values with reported shoulder pain in youth baseball pitchers.

Shoulder kinematics during pitching: comparing the slide step and traditional stretch deliveries.

Although studies have investigated the traditional stretch delivery, there is little biomechanical data describing the slide step delivery in baseball pitchers. Thus, the purpose of this study was to compare shoulder kinematics across the traditional stretch and slide step deliveries. To collect kinematic data from thirty-seven high school baseball pitchers, electromagnetic sensors recording at 140 Hz were affixed to various body segments.

Muscle activation of the uninjured leg during an acute Achilles tendon rupture.

The purpose of this study was to describe muscle activation of the uninjured leg during an acute Achilles tendon rupture. Electromyographic (EMG) data were collected on the following muscles: medial hamstring, biceps femoris, gluteus medius, gluteus maximus, and the gastrocnemius while the participant was performing a round-off dismount type of maneuver in which she sustained an Achilles tendon rupture. Electromyographic data analysis suggested that the participant fell into a knee valgus flexed hip position on the uninjured leg immediately after the injury.

Comparison of hamstring and gluteus muscles electromyographic activity while performing the razor curl vs. the traditional prone hamstring curl.

This study examined the muscle activation of the razor curl functional hamstring exercise (the razor curl has the total body extended and then requires the hips and knees to flex to 90 degrees simultaneously with full contraction of the hamstrings to further the knee flexion) to the traditional prone hamstring curl. Eight healthy, female intercollegiate athletes participated (mean age 20.8 +/- 3.

The razor curl: a functional approach to hamstring training.

This study examined the effectiveness of a functional hamstring training exercise, the razor curl on conditioning the hamstring and gluteal musculature. Eight healthy, female intercollegiate athletes participated (mean age 20.8 +/- 3.

Core stability and its relationship to lower extremity function and injury.

Core stability may provide several benefits to the musculoskeletal system, from maintaining low back health to preventing knee ligament injury. As a result, the acquisition and maintenance of core stability is of great interest to physical therapists, athletic trainers, and musculoskeletal researchers. Core stability is the ability of the lumbopelvic hip complex to prevent buckling and to return to equilibrium after perturbation.

Lateral subtalar dislocation in a 19-month-old female.

We report a lateral subtalar dislocation in a female 19-month-old after a minor fall. Review of the literature reveals no prior report of this injury in a patient of this age. This case illustrates the importance of thoroughly examining the pediatric patient.