Thresholds and intensity domains

A quick tutorial on the identification of intensity domains and training zones using metabolic thresholds. Some useful references for this can be found in the links below: Beaver et al. (1986) https://doi.org/10.1152/jappl.1986.60.6.2020 Beneke and von Duvillard (1996) https://journals.lww.com/acsm-msse/Fulltext/1996/02000/Determination_of_maximal_lactate_steady_state.13.aspx Burnley and Jones (2007) https://doi.org/10.1080/17461390701456148 Burnley and Jones (2018) https://doi.org/10.1080/17461391.2016.1249524 Jones et al. (2010) https://journals.lww.com/acsm-msse/Fulltext/2010/10000/Critical_Power__Implications_for_Determination_of.11.aspx Jamnick et al. (2020) https://link.springer.com/article/10.1007%2Fs40279-020-01322-8 Jones et al. (2019) https://doi.org/10.14814/phy2.14098 Poole et al. (2016) https://journals.lww.com/acsm-msse/Fulltext/2016/11000/Critical_Power__An_Important_Fatigue_Threshold_in.29.aspx Poole et al. (2021) https://doi.org/10.1113/JP279963