Some time ago I had an interesting discussion with one of our members Günther.
Is it better to train with time-limits (for example run 10 km with 5:03 min/km pace) or heart-rate-zone based.
TriCoreTraining is based on a heart-rate-zone system. This means that you train in certain heart rate zones and go as fast as you can under your current training conditions.
Heart-rate zones based training
I really appreciate this kind of training because in my almost 15 years of training experience I also tried to train based on time-limits.