Knowledge Tree
blood lactate concentration
Also known as: blood lactate concentration, blood lactate
Facts (11)
Sources
Sex differences in the cardiopulmonary and neuromuscular ... biorxiv.org Nov 11, 2024 9 facts
referenceLactate threshold is defined as the first work rate at which a non-linear increase in blood lactate concentration is observed, while lactate turnpoint is defined as the work rate that elicits a sudden and sustained increase in blood lactate concentration.
measurementDuring an interval exercise task, there were no main effects of sex observed for heart rate (p = 0.601), RPE (p = 0.497), or blood lactate (p = 0.203).
claimThere is no significant sex difference in oxygen consumption (VO2), carbon dioxide production (VCO2), respiratory exchange ratio (RER), or blood lactate levels during high-intensity interval exercise, indicating similar metabolic responses between males and females.
claimThe study found no sex differences in relative O2, respiratory exchange ratio (RER), and blood lactate response to high-intensity interval running, indicating similar metabolic responses, while the sex difference in potentiated twitch force (Qtw.pot) suggests that female knee extensors are more fatigue-resistant.
referenceAnsdell et al. (2020a) observed no sex differences in oxygen consumption, carbon dioxide production, respiratory exchange ratio, or blood lactate during constant-load exercise in the severe intensity domain.
measurementDuring an interval exercise task, heart rate, RPE (Rate of Perceived Exertion), and blood lactate levels increased progressively over time for both sexes (p < 0.001).
measurementDuring the interval task, participants performed at approximately 140% of their lactate threshold, reached O2 values of approximately 95% O2peak, achieved peak blood lactate concentrations of approximately 8 mmol·l-1, and exhibited peak RERs greater than 1.05, indicating the task took place in the severe domain.
procedureDuring the experimental intervals, participants performed three maximal voluntary contractions (MVCs) with femoral nerve stimulation and provided a blood lactate sample after moving from the treadmill to an isometric dynamometer.
procedureBlood lactate concentration is measured by taking a 10 μl sample from the earlobe via capillary puncture, which is then used to calculate lactate threshold and lactate turnpoint.
Sex differences in respiratory and circulatory cost during hypoxic ... nature.com Jul 2, 2019 2 facts
procedureBlood lactate (La) was determined from 0.3 μL fingertip blood samples collected at rest and after 5 minutes of walking, using a lactate analyzer (Lactate Pro 2, Arkray, Kyoto, Japan).
measurementResting blood lactate concentration is similar across sexes in both normoxia (1.2 ± 0.2 mmol L−1 in men vs. 1.2 ± 0.2 mmol L−1 in women) and hypoxia (1.2 ± 0.2 mmol L−1 in men vs. 1.2 ± 0.3 mmol L−1 in women).