Lactate analysis in two sessions of prescribed long-distance running throught heart rate deflection point

Abstract

Introduction: The long-distance running is receiving great dedication from the sport’s researchers regarding increasing performance therefore severalphysiological variables are important for it. Objective: The aim of this study was to analyze the heart rate deflection point, by the visual method which can be an efficient instrument for continuous aerobic training prescription. Materials and Methods: Ten (n = 10) runners (29.5 ± 6.4 years) took the test incremental test intermittent running from which was identified the HRDP for the prescription of two 30-minute workouts: a workout 10% below the HRDP, called subthreshold, and another 10% above, called suprathresh¬old. We used the statistical package SPSS 18.0 for data processing. Results: The lactate concentration during the subthreshold, as much in half time workout (3.85 mmol / L) as at the end (3.68 mmol / L) were significantly lower than the suprathresh¬old (p=0,001), which was 6.31 mmol / L in the minute fifteen, and 7 mmol / L at the end. Discussion: The Shapir-Wilk test shown that both concentration of the suprathresh¬old workout were significantly superior p <0.05 than the values of the subthreshold. In the subthreshold workout both values were below 4 mmol / L, confirming the literature as being a predominantly aerobic exercise. For the suprathresh¬old, there was no stability of this metabolite, which agrees from the literature for a workout of that intensity. Conclusion: These data suggest that HRDP may be an interesting non-invasive tool to determine whether the individual is training above or below the lactate threshold.