Retaliate

Duration 38:20 TSS 37 IF 0.76

01:00 @ 50% FTP
01:00 @ 58% FTP
01:00 @ 63% FTP
01:00 @ 68% FTP
01:00 @ 75% FTP
01:00 @ 50% FTP
2x
01:00 @ 90% FTP,
01:00 @ 70% FTP
02:00 @ 50% FTP
02:00 @ 80% FTP
02:00 @ 50% FTP
01:00 @ 110% FTP
02:00 @ 60% FTP
01:00 @ 80% FTP
01:00 @ 85% FTP
01:00 @ 90% FTP
01:00 @ 95% FTP
04:00 @ 60% FTP
02:00 @ 95% FTP
00:10 @ 120% FTP
01:00 @ 50% FTP
02:00 @ 95% FTP
00:10 @ 120% FTP
01:00 @ 50% FTP
01:15 @ 55% FTP
01:15 @ 48% FTP
01:15 @ 43% FTP
01:15 @ 35% FTP

The intervals are short enough to allow you to repeat the efforts. But hard enough to improve fitness.