Method of lactate elevation does not affect the determination of the lactate minimum

Area of Science:

• Exercise Physiology
• Sports Science
• Biochemistry

Background:

• The lactate minimum (Lac(min)) point is a critical physiological marker in endurance sports.
• Accurate determination of Lac(min) is essential for effective training program design.
• Various protocols exist for inducing blood lactate elevation prior to Lac(min) testing, but their influence is not fully understood.

Purpose of the Study:

• To investigate the impact of distinct lactate elevation protocols on the determination of the lactate minimum (Lac(min)) point in elite cyclists.
• To compare the reliability and validity of different pre-test lactate elevation methods.

Main Methods:

• Eight highly trained cyclists performed four continuous ramp lactate minimum tests.
• Protocols included ramp maximal aerobic power (RMP(max)) assessment, 30-s sprint, 40-s sprint, and two 20-s sprints with recovery.
• Each protocol was followed by a 5-min active recovery and a continuous ramp test.

Main Results:

• Peak blood lactate ([La](b)) was highest after RMP(max) and 40-s sprint compared to others.
• Despite initial differences, Lac(min) blood lactate levels were similar across all protocols.
• No significant differences were observed in power output at the Lac(min) point.

Conclusions:

• The determination of lactate minimum power in cycling is independent of the preceding lactate elevation protocol.
• This suggests flexibility in choosing pre-test protocols without compromising Lac(min) assessment accuracy.