Double threshold training
LoadProtocol scheduling two lactate-threshold sessions on the same day to maximise adaptation.
The double-threshold protocol, popularised by Norwegian coach Marius Bakken and later used by Jakob Ingebrigtsen, consists of two sessions around the lactate threshold (LT2) on the same day, separated by a few hours of rest. The aim: activate lactate transporters (MCT1/4) twice to force a superior lactate clearance adaptation compared to a single equivalent session. In long-distance triathlon, this protocol is mainly applied in running during Build and Peak phases.
In TriPaced:
In TriPaced, double-threshold appears in advanced Build and Peak plans when weekly volume exceeds 10-12 h. It is shown in the session card as 'complementary LT2 session' and is only prescribed when morning recovery is satisfactory (HRV and resting HR within limits).
Source Mujika et al., 2023: The return of the double-threshold training concept in elite middle-distance running, IJSPP