Effect of Strength Training on Jump-Landing Biomechanics in Adolescent Females.

Background: Sex-based differences in neuromuscular characteristics relevant to anterior cruciate ligament (ACL) injury risk may arise as compensation for divergent strength development during puberty. Strength training during this period may prevent the development of these undesirable neuromuscular characteristics.

Hypothesis: Strength-trained middle school girls will have improved jump-landing biomechanics compared with control participants.

Weak Hip Strength Increases Dynamic Knee Valgus in Single-Leg Tasks of Collegiate Female Athletes.

Clinical Scenario: Dynamic knee valgus (DKV) is a mechanical alteration in the knee that leads to increased risk of injury. Weakness of hip musculature in hip abduction (HABD), extension (HEXT), and external rotation (HER) may contribute to increased DKV in single-leg landing tasks. Focused Clinical Question: Is decreased hip strength associated with an increase in DKV during a single-leg landing task in collegiate female athletes? Summary of Key Findings: Three studies were included: One randomized control trial (RCT), one cohort study, and one case-control.

Active ankle motion may result in changes to the talofibular interval in individuals with chronic ankle instability and ankle sprain copers: a preliminary study.

Introduction: Alterations in talocrural joint arthrokinematics related to repositioning of the talus or fibula following ankle sprain have been reported in radiological and clinical studies. It is unclear if these changes can result from normal active ankle motion. The study objective was to determine if active movement created changes in the sagittal plane talofibular interval in ankles with a history of lateral ankle sprain and instability.

Immediate effects of anterior to posterior talocrural joint mobilizations following acute lateral ankle sprain.

Restrictions in ankle dorsiflexion range of motion (ROM) have been associated with decreased posterior talar glide in individuals with an acute lateral ankle sprain. Talocrural joint mobilizations may be used to restore joint arthrokinematics. Our purpose was to examine the effects of a single bout of anterior to posterior (AP) talocrural joint mobilization on self-reported function, dorsiflexion ROM, and posterior talar translation in individuals with an acute lateral ankle sprain.

Hip and knee muscle function following aerobic exercise in individuals with patellofemoral pain syndrome.

Patellofemoral pain syndrome (PFPS) is a commonly experienced knee disorder that can result in altered muscle activation of the surrounding musculature. There is little evidence on effects of aerobic exercise on quadriceps torque and EMG activation of the vastus medialis obliquus (VMO), vastus lateralis (VL), and gluteus medius (GM). In this study 20 healthy individuals and 20 patients with PFPS had measures of torque and muscle activation taken following aerobic exercise.

Clinical assessment of ankle injury outcomes: case scenario using the foot and ankle ability measure.

Unlabelled: PATIENT SCENARIO: A 20-y-old male Division 1 college basketball player sustained a grade 2 inversion ankle sprain during preseason that is preventing him from practicing and competing. CLINICAL OUTCOMES ASSESSMENT: The Foot and Ankle Ability Measure (FAAM) was administered to the injured athlete as an evaluative tool to provide the clinician with valuable subjective information on the patient's self-reported function. The FAAM consists of 2 subscales: the activities of daily living (ADL) subscale and the sports subscale.

Lower extremity neuromuscular control immediately after fatiguing hip-abduction exercise.

Context: Fatigue of the gluteus medius (GMed) muscle might be associated with decreases in postural control due to insufficient pelvic stabilization. Men and women might have different muscular recruitment patterns in response to GMed fatigue.

Objective: To compare postural control and quality of movement between men and women after a fatiguing hip-abduction exercise.