Using lactate threshold to determine the intensity of marathon running in women practicing sports unprofessionally
Journal Title: Antropomotoryka. Journal of Kinesiology and Exercise Sciences - Year 2015, Vol 25, Issue 69
Abstract
Study aim. Determining objective indicators of marathon running intensity in women practicing sports unprofessionally, based on lactate test results.Study design. Research was conducted in 2013–2015. The participants were 10 women aged 23 to 43 years who ran marathons unprofessionally. The level of sports (from the “amateur level” to 1st sports class) and training experience (3-8 years) was varied. The lactate threshold test [1] was carried out on the track at an athletics stadium in the week prior to the marathon. During its course, the determined speed and heart rate at lactate threshold were used to calculate the indicators of marathon running intensity. The times to run the whole distance of the marathon, as well as the speed at which the various kilometre-long sections were covered, came from the official statements of the competition. The heart rate during the exercise test as well as the sporting competitions were measured using the Sport-Tester. An analysis of the collected materials was conducted in order to determine the relationship between the individual and average measurements of running speed determined during the lactate threshold test and competitions using: absolute values of measurements, percentage indicators, Pearson’s correlation coefficient and regression equations. Calculations were performed using Microsoft Excel 2007.Results. Based on the results of the statistical analysis we have found a high correlation between speed set at lactate threshold and the speed during the marathon run, which confirms the statistically significant Pearson coefficient correlation (Rxy = 0.87), and regression equation: y = 1.096x – 0.3905. Demonstrated in the same manner is the high consistency in the distribution of the intensity of the run on following sections of the route of the marathon, with particular emphasis on heart rate and speed recorded in the 1st and 2nd parts of the marathon (Rxy = 0.97). Detailed analysis of individual cases has proven that statistical findings may relate only to the athletes consistently carrying out the tactical assumptions. Among them were only the runners presenting a high level of sports (1st and 2nd class) and with greater technical and tactical experience in marathon competing.Conclusions. 1. The results confirmed great usefulness of the speed and heart rate indicators, set before the competitions in lactate threshold “pitch test” in order for the women to carry out tactical and technical tasks while performing marathon running. 2. Due to the fact that during long runs at a constant speed there is an increase tendency in response rates of the cardiovascular system along with the duration of the effort, which is the body’s process of adaptation to changing energy needs, kinematic running indicators, determined in the lactate threshold test, should be considered as more reliable in the process of training and tactical as well as technical tasks performed at marathon competitions. 3. Similarly as in the case of men, in women performing marathon running unprofessionally, the lack of subordination of continuous running tactics and techniques to objective, potential physiological and kinematic indicators of continuing efforts for a long time, causes a limitation in obtaining the best possible results at sporting events.
Authors and Affiliations
Wacław Mirek, Joanna Gradek, Edward Mleczko
Keywords
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