The aim of this study is to explain the principles of statistical models used to determine blood lactate threshold in detail.

In this book, the data type and format (work load / blood lactate) that can be acquired from cycle ergometers are preferred. The principles for cycle ergometers are also valid for other ergometer types with suitable data type and format (speed / blood lactate).

The first version of this books was published in 2013 in Turkish Language with earlier version of MS ExcelL.

In 2004 and 2014 the author have developed two different software for direct calculation of blood lactate threshold.

This international edition both includes MS Excel procedures for readers who are not familiar with statistical models of blood lactate threshold calculations and direct blood lactate threshold calculator software for advance users.

It is simpler to use direct calculation software but it is not suggested for users with low experience on statistical models of blood lactate threshold.