How Are Lactate Threshold and Ventilatory Threshold Related?

The Ventilatory Threshold (VT) is determined from ventilatory changes that reflect trend changes in your CO2 extraction, O2 consumption, and the breathing volume and rate. This trend change is correlated with the lactate threshold (LT) where we collect blood samples at progressively higher intensity levels.

Are lactate and ventilatory thresholds similar?

The lactate threshold has been characterised at either a fixed or variable blood lactate concentration (BLa). ... Conversely, evidence from patients with McArdle's disease indicates that although no lactic acid is produced, these individuals do experience a threshold-like ventilatory response during incremental exercise.

Does lactate threshold occur at the same workload as ventilatory threshold?

Authors agreed that workloads at the first ventilatory threshold (i.e., VT₁) are strongly related to the workload at which lactate starts to increase above resting values (LT; Wasserman et al., 1973; Lucía et al., 2000; Pallarés et al., 2016).