P-38 Association between 1-km time trial cycling speed and recovery blood lactate at various intervals
Author(s):
S Gupta , A Stanula , A Goswami
Year of Presentation:
2022
Objective: Major objectives of this study were to determine (1) the relationship between cycling speed and blood lactate concentration ([BLa]) at various intervals following 1-km Time Trial cycling (1-kmTT), (2) the arrival time of peak blood lactate ([BLa]peak) during recovery, and (3) heart rate (HR) response during 1-kmTT.
Design and Methods: In 12 track cyclists, [BLa] was determined at 3 min ([BLa]3min), 5 min ([BLa]5min), and 7 min ([BLa]7min) of the recovery period following 1-kmTT race. The highest [BLa] among the 3 recovery blood samples was recorded as the [BLa]peak. Heart rate was recorded during the race. Correlation (r) and effect size (ES) between average cycling speed and [BLa] at various intervals following recovery were determined.
Results: The [BLa]3min (18.15 ± 2.80 mmol/L) was the highest followed by [BLa]5min (17.32 ± 2.65 mmol/L) and [BLa]7 min (15.80 ± 2.58 mmol/L), whereas [BLa]peak was 18.23 ± 2.78 mmol/L. Peak heart (HRpeak) (189.4 ± 4.2 beats/min) of the cyclists attained at the end stage of 1-kmTT was 97.8 ± 1% of their maximal heart rate. Average cycling speed (14.31 ± 0.53 m/s) showed best correlation with [BLa]peak (r = 0.582, p = 0.047, ES = LARGE), followed by [BLa]3min (r = 0.561; p = 0.058, ES = LARGE), [BLa]5min (r = 0.48; p = 0.114, ES = MEDIUM) and [BLa]7min (r = 0.382; p = 0.221, ES = MEDIUM).
Conclusion: The results conclude that: (1) 1-kmTT performance is best correlated with [BLa]peak, (2) usually [BLa] peak arrives 3 min following the race, and (3) heart rate reaches close to the maximum, during race.