Digital fluoroscopic video assessment of glenohumeral migration: Static vs. Dynamic conditions.

The purpose was to compare glenohumeral (GH) migration, during dynamic shoulder elevation and statically held positions using digital fluoroscopic videos (DFV). Thirty male volunteers (25+/-4 years) without right shoulder pathology were analyzed using DFV (30Hz) during arm elevation in the scapular plane. DFV were obtained at the arm at side position, 45 degrees , 90 degrees , and 135 degrees for static and dynamic conditions.

Effect of running shoe type on the distribution and magnitude of plantar pressures in individuals with low- or high-arched feet.

Background: Research addressing the effect of running shoe type on the low- or high-arched foot during gait is limited. We sought 1) to analyze mean plantar pressure and mean contact area differences between low- and high-arched feet across three test conditions, 2) to determine which regions of the foot (rearfoot, midfoot, and forefoot) contributed to potential differences in mean plantar pressure and mean contact area, and 3) to determine the association between the static arch height index and the dynamic modified arch index.

Methods: Plantar pressure distributions for 75 participants (40 low arched and 35 high arched) were analyzed across three conditions (nonshod, motion control running shoes, and cushioning running shoes) during treadmill walking.

Fluoroscopic assessment of rotator cuff fatigue on glenohumeral arthrokinematics in shoulder impingement syndrome.

Background: Although prior researchers have assessed glenohumeral arthrokinematics using isometrically held arm postures with standard radiographs, dynamic assessment of glenohumeral arthrokinematics has been limited. This study utilized video fluoroscopy to analyze superior inferior glenohumeral migration during dynamic arm elevation in individuals with outlet impingement syndrome, before and after fatigue of the rotator cuff.

Hypothesis: Prior to the study, it was hypothesized that during the pre-fatigue state, glenohumeral migration would be in the superior direction, and that post-fatigue there would be a significant increase in superior migration.

Dynamic plantar pressure parameters associated with static arch height index during gait.

Background: Although extreme values of arch height have been associated with increased risk for overuse injury, knowledge is limited regarding the association between arch height and plantar pressure distributions during gait. The primary purpose of this study was to explore which plantar pressure measurements during gait were associated with static arch height and arch height index.

Methods: Static arch height, arch height index, and dynamic plantar pressure distributions were collected for 1000 subjects (566 males, 434 females, 30.

Effect of using truncated versus total foot length to calculate the arch height ratio.

Objective: The purpose of this study was to determine the arch height ratio in a large cohort of subjects as well as to assess the reliability and validity of the foot measurements utilized in the study.

Method: Eight hundred and fifty subjects, 393 women and 457 men, consented to participate in the study. The dorsal arch height, total foot length, and the truncated foot length were used to calculate two variations of the arch height ratio.

The effect and safety of short-term creatine supplementation on performance of push-ups.

The effects of short-term oral creatine (Cr) supplementation on exercise performance and on blood pressure and renal function were assessed. Thirty-five healthy, active duty, U.S.

The effects of treadmill type on heart rate and pain threshold velocity in individuals with lower-extremity musculoskeletal pain.

Study Design: This study utilized a quasi-experimental design in which subjects served as their own controls.

Objective: To determine whether heart rate, pain threshold velocity, and pain perception varied in patients running on a soft-belt treadmill versus a standard hard-belt treadmill.

Background: According to promotional literature, the relatively new Orbiter soft-belt tread produces a greater increase in heart rate at a given velocity as well as a higher velocity tolerance while walking or running.