The Red Line Zone 90% to 100%
Training in this zone will only be possible for short periods. It effectively trains your
fast twitch muscle fibres and helps to develop
speed. This zone is reserved for
interval running and only the very fit are able to train effectively within this zone.
AboutExercise.com
I am mostly Fast Twitch.
Powerlifting, sprinting, fastball baseball pitching, low cadence cycling up hills, punching holes in car windows etc.
I regularly train 95% of maximal ( 100% of 220 - age ).