z1 endurance w/low cadence intervals

5 minutes at cadence 90 [ERG watts = 50% of FTP]
10 minutes at cadence 90 [ERG watts = 60% of FTP]
20 minutes at cadence 70 [ERG watts = 80% of FTP]
5 minutes at cadence 90 [ERG watts = 55% of FTP]
20 minutes at cadence 70 [ERG watts = 80% of FTP]
10 minutes at cadence 90 [ERG watts = 60% of FTP]