Originally Posted by
terrymorse
I recently listened to San Milan's video interview with Dylan Johnson, and I took away a couple of points he made about sub-LT1 training:
- working just below LT1 maximizes the lipolytic system activity
- if you do a hard effort during a zone 2 ride, you body produces hormones that turn off lipolysis, reducing the training effect
- if you want to include a hard effort during zone 2 ride, save it until the end of the ride
That might explain the (pre-power meter) advice to aim for reverse splits on long rides. I think it also explains why, when I go out just a bit too fast, it takes a lo-o-ong time to get back to my normal pacing.