Following a 12-week anaerobic based training program, what is the expected lactate response to a
graded maximal exercise test?

Question

BlackTom AI · Accepted Answer

Question restatement: After completing a 12-week anaerobic-based training program, what change in the lactate response would you expect during a graded maximal exercise test?

Option a: Leftward shift in the lactate curve compared to the pre-test. This would imply that lactate begins to accumulate at a lower exercise intensity, which is typically seen with deconditioning or certain maladaptations, not usually after a structured anaerobic training block. Therefore this option does not align with common training adaptations that delay lactate accumulation.

Option b: An exponential rise in lactate response immediately after starting exercise. Such a pattern would indicate an immediate, excessive lactate production from the very onset of activity, which is not characteristic of typical training adaptations after 12 weeks of endurance/anaerobic programming. In trained individuals, lactate often rises more gradually as intensity increases, not instantly to high levels.

Option c: Rightward shift in the lactate curve compared to the pre-test. A rightward shift means that a higher workload or higher intensity is required before lactate begins to accumulate rapidly, reflecting an improved lactate threshold or enhanced metabolic efficiency due to training. This is a classic adaptive response to endurance-oriented or high-intensity conditioning programs, including anaerobic-based regimens, where the body becomes better at clearing lactate or tolerating higher lactate concentrations before fatigue sets in.

Option d: Blood lactate stays the same. If lactate levels remained unchanged despite a training program, it would suggest no metabolic adaptation in lactate handling, which contradicts the expected physiological improvements after a structured 12-week program. This makes this option implausible given the training stimulus described.

Summary of the reasoning: The most consistent interpretation of a 12-week anaerobic-based training program is an improved ability to sustain higher intensities before lactate accumulates, i.e., a rightward shift of the lactate threshold curve. The other options describe patterns that do not match typical training adaptations: a leftward shift indicates worse lactate tolerance, an immediate exponential rise is unrealistic for trained individuals, and no change in lactate suggests no adaptation at all.

EXPT2168-Exercise Assessment and Testing, T1 2025

Following a 12-week anaerobic based training program, what is the expected lactate response to a graded maximal exercise test?

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