Faculty Mentor(s)

Dr. Mark Northuis, Kinesiology

Document Type

Poster

Event Date

4-12-2024

Abstract

Assessment of urinary biomarkers pre- and post-exercise has been used to monitor athletes' health status. This HSRB approved descriptive study measured 8 urinary biomarkers in 19 collegiate cross-country runners (M-10, F-9, age 20±1.0 years) throughout the first nine weeks of a fall cross-country season. Baseline values were measured prior to the start of the season and were repeated two and three days post-race. They were also measured pre-, immediately post-, and 1-day-post hard workout. All values were within normal, healthy physiological limits, however, there were some mean changes that occurred over the course of the season and within workouts. Significant group mean changes throughout the season were demonstrated in urinary protein, pH, evidence of blood, and specific gravity. Gender-specific changes within workouts were shown in several variables. Females had higher urobilinogen and protein post-workout and 1-d post-workout, while males had greater values post-workout and 1-d post-workout for pH, evidence of blood, and specific gravity. All of the 2-day and 3-day post-race values were not significantly different from their baseline values. The results reveal seasonal trends. Elevated (high, but normal range) values of urobilinogen and protein and more acidic urine (pH<5.5) are consistent with the females' higher specific gravity values, all indicating slight dehydration. Female hydration status was lower than male hydration status, which over time can affect renal blood flow. Positive urine test for blood is consistent with strenuous exertion by the participants and typically dissipated within 1-d post-workout. The 2-d and 3-d post-race values indicate a more rapid return to homeostasis for urinary metabolite markers than other physiological recovery indicators.

Comments

This research was supported by the Hope College Kinesiology Department

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