Relationship Between Lactate Threshold, OBLA, VO2 Max And 5k Running Performance
Research into the relationship between physiological variables and running performance has been variable. The aim of this study was to examine the relationship between 5k running performance and a number of physiological variables in a group of 11 trained club runners (Age 21.451.63yrs, Height 175.092.77cm, Weight 67.865.12kg). The athletes underwent a laboratory treadmill test to determine their maximum oxygen uptake (VO2 max) and running velocities at lactate threshold (v-Tlac) and blood lactate concentration of 4mM (v-OBLA). Running performance was determined by a 5k time-trial on an athletics track for which the average time was 1097.09 ± 108.02 secs. The mean velocities for v-Tlac and v-OBLA were 15.18 ± 1.5km/h, 16.76 ± 1.60 km/h and mean VO2max was 59.10 ± 3.54 ml/kg/min. The best single predictors of 5k running performance were v-OBLA and VO2max (p = .003, p = .007) while v-Tlac was slightly poorer (p = .013). It is concluded that lactate variables may be valid and reproducible predictors for 5km running performance.
Research throughout history has established that a number of physiological variables relate to distance running performance, including Lactate Threshold (Tlac), OBLA and VO2 Max (Conley and Krahenbuhl, 1980; Costill, Thomason and Roberts, 1973; Coyle et al, 1983; Farrell et al, 1979; Hagberg and Coyle, 1983; Lafontaine, Londeree and Spath, 1982). The results from this research have been variable.
Evidence has shown that blood lactate variables highly correlate with running performance over a variety of distances. Additionally, these variables contribute to running performance variance more than any other physiological variables (Yoshida et al, 1990, 1993). ‘Lactate Threshold’ describes the point at which exercise begins to hurt more than it should because the body’s lactate production
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