incidence of hematuria with middle distance track running interval training
abstract
the purpose of this study was to answer the question, “do middle distance
track athletes experience hematuria with their normal competitive season interval
workouts?” secondary purposes were (1) to identify the type of workout most
associated with hematuria as workouts were classified on the basis of intensity
and duration and (2) compile supplementary measures associated with these
workouts that would hopefully help to point towards a cause. the participants for
this study were a group of seven male and three female (n=10), healthy,
experienced middle distance runners aged 19-56 years who were all members of
the 阿根廷vs墨西哥竞猜
athletics club in thunder bay, ontario. over the course
of four weeks, subjects underwent urinalysis before and immediately following,
their twice weekly interval sessions, over the course of a four week period. pre-workout
urine samples were examined for ph, specific gravity, and the presence
of hematuria, proteinuria, and granular casts using reagent strip analysis. positive
hematuria samples precluded follow up analysis on that subject. post workout
urine samples underwent reagent strip analysis for ph, specific gravity,
hematuria, and proteinuria. positive specimens for hematuria were analysed
under a microscope to calculate a more accurate red blood cell (rbc) and
granular cast loss. subjects were asked to provide follow-up samples until the
reagent strip indicated a negative result for hematuria. supplementary measures
of 4min. peak blood lactate (pbla), a subjective rating of perceived exertion
(rpe), and the amount of time the subject worked above 65% of their vo2max (65% vo2max) were used to indicate if a specific level of exertion was required to
induce hematuria in middle distance track runners. urine sampling indicated that
middle distance track runners do experience hematuria, with nine of the ten
subjects providing a positive sample at least once during the four week period.
this study was unable to prove which of the thirteen workout classifications had
the greatest incidence of hematuria because o f the unequal number of subjects
completing each workout classification the results did demonutate that the
greatest incidence of hematuria occurred following workouts of 800 m and 1500
m running pace with durations of 1001- 4000 m. the individual mean loss of red
blood cells (rbc) per high power microscopic field (hpf) for the study group
ranged between 2-81 rbc. all positive samples contained microcytic whole
rbc. protein and granular casts were observed regardless of the presence of
rbc. a clear relationship between rbc loss and the supplementary measures of
exertion was not observed.
collections
- retrospective theses [1604]