ATL : Acute Training Load (fatigue)
LoadYour recent fatigue, a 7-day moving average of TSS.
ATL reacts fast: it climbs after a big week and falls after 2-3 recovery days. It's the snapshot indicator of how much fatigue you're piling on.
In TriPaced:
In TriPaced, ATL is plotted alongside CTL. When ATL stays above CTL, TSB drops far negative and the app suggests easing off.
Source Allen, Coggan & McGregor, Training and Racing with a Power Meter (3rd ed., 2019) - Banister PMC model