Improved reliability of the urine lactate concentration under controlled hydration after maximal exercise

Abstract

Context: Urine lactate may be a novel biomarker of lactate production capacity but its reliability has been unsatisfactory so far.

Objective: To compare the reliability of urine lactate between controlled hydration and no hydration after maximal exercise.

Material and methods: Athletes performed swimming exercise four times: two followed by consumption of 1 L of water and two followed by no water intake. Blood and urine lactate was measured.

Results: The reliability of urine lactate was good and similar to that in blood only after controlled hydration. Blood and urine lactate were correlated under both hydration conditions.

Discussion and conclusion: Controlled hydration after exercise provides satisfactory reliability of urine lactate.

Keywords:

• Anaerobic lactic capacity
• blood lactate
• blood glucose
• urine lactate
• exercise metabolism
• intraclass correlation coefficient
• swimming
• hydration
• reliability

Disclosure statement

This study was supported by funds from the School of Physical Education and Sport Science at Thessaloniki, Aristotle University of Thessaloniki. The authors report no conflicts of interest.