Open AccessHematological variability analysis after road marathon vs ultratrail
Author(s) -
María Desamparados Bernat-Adell,
Rania Achouak Hafsi,
Pablo Salas-Medina,
Ana Folch Ayora,
Carlos Hernando-Domingo,
Ignacio Martínez-Navarro,
Eladio Collado-Boira
Publication year - 2020
Publication title -
kinesiology
Language(s) - English
Resource type - Journals
eISSN - 1848-638X
pISSN - 1331-1441
DOI - 10.26582/k.52.2.2
Subject(s) - mann–whitney u test , wilcoxon signed rank test , statistical significance , univariate analysis , athletes , logistic regression , medicine , demography , mathematics , physical therapy , multivariate analysis , sociology
The practice of long- and medium-distance races has exponentiallyincreased the number of participants in recent years. They are carried outunder extreme conditions that cause both biochemical and anthropometric changesin athletes and, in addition, have serious risks associated, such asdehydration, thermal disorders, or hypoglycemia. Knowledge regarding alterationsat hematological level after this type of effort is limited. The objectives ofthis p re-post analytical descriptive observational study were: todescribe and compare hematological values in amateur runners pre and post road marathon and ultratrail races, and to compare the hematological parametersbetween the groups in the two times analyzed by means of univariate descriptivestatistical analyses, intra-group pre-post comparisons (Wilcoxon Signed-RankTest), and comparisons between the groups (Mann-Whitney U Test). Effect sizewas calculated using Cohen’s D. An explanatory model (Multiple LogisticRegression) was created. Statistical significance was set at p<.05. The Wilcoxon test for marathon runnersobserved significant differences (p≤.001) in the white series. In ultratrail runners,the results were similar, with significant differences (p≤.001) in the plateletseries. The Mann-Whitney U test showed the same pre-race hematologicalconditions for both groups, except for hematocrit and corpuscular values(p≤.001). Significant differences (p≤.001) were also found in the post-race leukocyte and neutrophil values. Significant differences in hematologicalparameters have been observed both between and within the groups. Thedifferences with greater significance corresponded to the leukocyte series.