Fluid Ingestion Attenuates the Decline in V̇O2peak Associated with Cardiovascular Drift.

The article presents a study which investigated whether manipulation of cardiovascular drift by changing exercise duration or by fluid ingestion is associated with altered peak oxygen uptake (OU). OU was measured in several trained men after exercise in relative humidity. Stroke volume, heart rate, and related measures were also assessed. It was concluded that the progressive decline in stroke volume during prolonged, constant-rate submaximal exercise in a warm environment, reflective of increased cardiovascular strain associated with hyperthermia, dehydration , and other changes that occur over time, reduces OU.