Z7 : Zone 7: neuromuscular power (sprint)
LoadAll-out effort lasting a few seconds : pure sprint, beyond normal power zones.
Z7 is absolute sprint: under 30 seconds, often < 10 s. Power exceeds 200-300% of FTP. It's no longer about aerobic capacity but about maximal fast-twitch fiber recruitment. In long-distance triathlon, Z7 is theoretically absent from the plan. In road or track cycling, it's the territory of finishing sprints.
In TriPaced:
In TriPaced, Z7 is not prescribed in long-distance triathlon plans. If Z7 power shows up in post-session analysis, it's either an overly aggressive hill start or a spontaneous end-of-ride sprint : interesting for neuromuscular activation, but don't repeat it mid-BUILD block.