The study aim was to evaluate associations between hip and ankle strength, ROM and YBT-LQ. The study involved 66 healthy males (age: 25.2+6.8 years). Each participant was assessed with ankle DF ROM, hip IR ROM, ER ROM and hip ABD, EXT and ER muscle isometric strength. The YBT-LQ test was performed for both limbs (stance and kicking leg). Forward two-step multiple linear regression analysis was performed to determine relationships between a predictor set and the criterion variable. Of 6 input variables for regression models, only 2 (ankle DF ROM, hip ABD strength) explained variance of YBT-LQ performance. Variance for anterior, posteromedial (PM) and posterolateral (PL) reach distances were explained from R2 = 0.15 to R2 = 0.49, but the models’ composition in PM and PL differed between legs. YBT-LQ composite score in both legs was explained by the same model, including ankle DF ROM and hip ABD (R2 = 0.44; R2 = 0.25). Hip ABD strength and ankle DF ROM assessment may be useful in individuals with poor YBT-LQ test performance to detect specific musculoskeletal deficits. Moreover, the regression models in stance leg for all reaches and composite score were more predictive than for the kicking leg.
Study aim: The aim of the work was to determine the effects of an 18-week training programme on the economics of running at a speed corresponding to the lactate threshold of an athlete from the track-and-field section of AZS AWF (University of Physical Education) Kraków. In addition, the objective was to determine the average heart rate and speed during a 10-km during in relation to threshold values for these parameters. Materials and methods: In the study, heart rate and speed at lactate threshold were determined using the pitch test. The indirect calorimetry method was applied to assess energy expenditure of the run. The training work carried out by the study participant was subject to registration and quantitative as well as qualitative analysis. Results: Observations indicated that the implemented training programme resulted in a reduction of energy expenditure by 6.32% when running at threshold speed. During the 10-km competitive run, the studied athlete obtained an average heart rate and running speed at a level corresponding to 109% and 108% (respectively) of the threshold values for the specified parameters. Conclusions: The proposed training programme had a positive effect on running economics at threshold speed. It was shown that the average heart rate and speed obtained during the competition over a distance of 10 km exceeded the threshold values of the mentioned parameters by 9 and 8%, respectively.
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