T2kynnystä

T2kynnystä is a Finnish term that translates to "T2 threshold" in English. It is most commonly used in the context of exercise physiology and sports science. The T2 threshold represents a point during incremental exercise where lactate accumulation in the blood begins to accelerate significantly. This acceleration is often associated with an increased reliance on anaerobic metabolism to meet the energy demands of the working muscles.

Understanding the T2 threshold is important for training and performance assessment. It is generally considered a marker of an individual's aerobic capacity and endurance. When an athlete can sustain a higher intensity before reaching their T2 threshold, it indicates a more developed aerobic system. This threshold is typically determined through laboratory tests involving incremental increases in exercise intensity while monitoring blood lactate levels.

The T2 threshold is distinct from the T1 threshold, also known as the lactate turnpoint or OBLA (Onset of Blood Lactate Accumulation). While T1 marks the initial rise in blood lactate, T2 signifies a more substantial and sustained increase, indicating a shift towards a higher level of anaerobic contribution to energy production. Training at or near the T2 threshold can help improve an athlete's ability to sustain higher intensities for longer durations. It is a key indicator for endurance athletes aiming to optimize their training zones.