This video reviews the first and second ventilatory thresholds (VT1 and VT2) and the 3-zone training model built around these key metabolic markers that is the basis for cardiorespiratory exercise intensity in ACE Integrated Fitness Training Model. Through actual demonstrations, this video illustrates exercise efforts in each zone and the application of the talk test to VT1 and the ability to speak more than one or two words to VT2."
