Publications by authors named "David J Hryvniak"

Outdoor gait-training has been successful in improving pain and reducing contact time during outdoor running for runners with exercise-related lower leg pain (ERLLP). However, it is unclear if these adaptations translate to gold standard treadmill running and clinical strength assessments. The study purpose was to assess the influence of a 4-week outdoor gait-training intervention with home exercises (FBHE) on treadmill running biomechanics and lower extremity strength compared to home exercises alone (HE) among runners with ERLLP.

View Article and Find Full Text PDF

Objectives: To assess the effects of a 4-week randomised controlled trial comparing an outdoor gait-training programme to reduce contact time in conjunction with home exercises (contact time gait-training feedback with home exercises (FBHE)) to home exercises (HEs) alone for runners with exercise-related lower leg pain on sensor-derived biomechanics and patient-reported outcomes.

Design: Randomised controlled trial.

Setting: Laboratory and field-based study.

View Article and Find Full Text PDF

Objectives: To prospectively monitor biomechanics, session-rating of perceived exertion (sRPE), and wellness in a cohort of collegiate Division-1 cross-country athletes over the course of a single competitive season.

Design: Prospective cohort study.

Methods: Healthy Division-1 cross-country athletes (9 males, 13 females) were prospectively followed over a single competitive cross-country season.

View Article and Find Full Text PDF

Objective: To identify if any differences exist in IFM size and quality in single leg weight bearing position between healthy and PFP participants based on foot posture.

Design: Cross-sectional, matched case-comparison study SETTING: University Laboratory Setting PARTICIPANTS: 35 PFP (age:20.46 ± 3.

View Article and Find Full Text PDF

Exercise-related lower leg pain (ERLLP) is one of the most prevalent running-related injuries, however little is known about injured runners' mechanics during outdoor running. Establishing biomechanical alterations among ERLLP runners would help guide clinical interventions. Therefore, we sought to a) identify defining biomechanical features among ERLLP runners compared to healthy runners during outdoor running, and b) identify biomechanical thresholds to generate objective gait-training recommendations.

View Article and Find Full Text PDF

Although endurance exercise improves age-associated endothelial dysfunction, few studies have examined the effects of resistance training and the potential molecular mechanisms involved in altering vascular reactivity with age. Young (9 months) and aged (20 months) male, Fisher 344 rats were divided into four groups: Young Sedentary (YS, n = 14), Young Trained (YT, n = 10), Aged Sedentary (AS, n = 12), and Aged Trained (AT, n = 10). Resistance training consisted of climbing a 1 m wire ladder, at an 85 degrees angle, 3 days/week for 6 weeks with increasing weight added to the tail.

View Article and Find Full Text PDF