Originally Posted by
terrymorse
Thanks for your feedback.
I reckon my FTP is set somewhat low, as I haven't done a true all-out, 20-minute FTP test. I'm just going with what Garmin estimates automatically, which right now is 2.98 W/kg.
Can you explain what TSB and CTL are? I'm not familiar with those terms.
As far as total training load goes, Garmin Connect tells me I am staying within the green "optimal" band:
I'm assuming you know what TSS (training stress score) is?
ATL is Acute Training Load. It's what you've done recently. In TSS. This is a gauge of your fatigue.
CTL is Chronic Training Load. It's what you've done for the last while. Also in TSS. This is a gauge of your fitness.
TSB is Training Stress Balance, it's the difference between CTL and ATL.
Those are old skool bike guy terms, Coggan stuff. Garmin's Training Load feature is entirely different. It gets a similar name because it's trying to answer the same question, but it works completely differently. The Garmin one is an estimate of how much excess post exercise oxygen consumption is going on based on HR data.