Estimation of V̇O2peak and lactate threshold in recreationally active persons through new equations for a modified Åstrand's maximal incremental treadmill test

Background: The accurate and safe assessment of physiological parameters, such as the highest oxygen consumption (V̇O2peak) and the lactate threshold (LT), plays a crucial role in optimizing training intensity and monitoring long-term progress, ensuring the safety of the trainees. Sources of data: Data were obtained during tests performed by 28 recreationally active young adults with varying levels and types of training. These individuals underwent a modified incremental Åstrand protocol for a treadmill test to exhaustion, during which their V̇O2peak and lactate threshold (Onset of Blood Lactate Accumulation method) were directly assessed. Areas of agreement: Tests to exhaustion are considered valid methods for directly measuring V̇O2peak and determining LT. However, the direct assessment of V̇O2peak and LT requires specific equipment and raises various practical issues. Areas of controversy: Indirect methods for estimating of V̇O2peak and lactate threshold are simpler to use, but these methods are often difficult to generalize or have a high margin of error from the many variables that can affect a subject's V̇O2peak and lactate threshold. Growing points: These results enable estimation of V̇O2peak and LT in apparently healthy young adults engaged in regular physical activity, regardless of their specific training backgrounds. Areas timely for developing research: Future research should focus on developing more precise field-based methods for estimating V̇O2peak and lactate threshold, with lactate threshold presenting particular challenges due to the need for blood sampling equipment.