4wk FTP Booster W4D4 Sub-threshold XX #2W4D4 Author: Matthias BSport: bikeDuration: 48 minDominant zone: vo2maxIntensity: 0.89Updated: 2026-04-22T09:32:12.418ZStructure5 min @ 51% (51w)5X30 sec @ 65% (65w)30 sec @ 80% (80w)3 min @ 51% (51w)10X2:30 min @ 92% (92w)30 sec @ 120% (120w)5 min @ 51% (51w)