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Nemtsev O.B., Bguashev A.B., Nemtseva N.A., Gunazhokov I.K. Analysis of the best world female heptathletes results

DOI: 10.34835/issn.2308-1961.2020.7.p267-273
 
Analysis of the best world female heptathletes results
Oleg Borisovich Nemtsev, the doctor of pedagogical sciences, professor, Aydamir Baterbievich Bguashev, the candidate of pedagogical sciences, professor, Natalia Alekseevna Nemtseva, the candidate of pedagogical sciences, senior lecturer, Igor Kimovich Gunazhokov, the candidate of pedagogical sciences, senior lecturer, Adyghe State University, Maykop

Abstract
The aim of the research was to study the peculiarities of the competitive activity of the all-time best female heptathletes. The 100 best results in the history of the heptathlon were analyzed, which were divided into groups of "elite" (results from 1st to 32nd, overall score from 7291 to 6635 points, delta 656 points) and "sub-elite" (results from 33rd to 100th, total score from 6633 to 6371 points, delta 262 points). The assessment of the significance of the differences between the elite and sub-elite groups, as well as the values of the contribution of different events to the total score was carried out by using the t-test. The significance of differences in the contribution of different events to the total score within each of the qualification groups was determined using one-way analysis of variance, then t-test was applied to determine the significance of differences in contributions to the overall score in each of the pairs of events included in the heptathlon, after which the Holm-Bonferroni correction for multiple comparisons was calculated. To estimate the effect size, Cohen's d-index was calculated. The strength of the relationship between the score in different events and the overall score was assessed using the Pearson correlation coefficient. It was found that the absolute results in all events of heptathlon, with the exception of 800 meters run (p = 0.245, d = 0.26), were significantly higher in the elite group (p from 0.000 to 0.007) than in the rest of the athletes (large and medium effect sizes). The greatest differences in points between the elite and sub-elite groups are observed in the long jump (8.56%), the smallest – in the 800-meter run (1.94%). This is the reason for the differences in the contribution of different events in the total score: in the elite group the contribution of long jump is significantly greater (15.5 and 15.1%, respectively, p = 0.035, d = 0.47), and in the sub-elite group – 800 meters running (13.8 and 14.3%, p = 0.031, d = 0.49). The part of female athletes with one event, whose contribution to the total score is more than the group mean by more than a standard deviation in the elite (50.0%) and sub-elite (46.3%) groups is significantly greater than the part of female athletes with two (21.9 and 25.4%) and three (6.3 and 3.0%) such events, or not having any such events (21.9 and 25.4%). Moreover the differences in these shares between the compared groups are non-significant (p = 0.837).
Keywords: track and field combined events, long and high jumps, shot put, javelin throw.
 
References
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Contact information: oleg.nemtsev@mail.ru
Article arrived in edition 24.07.2020
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