Biking 20:00 [4]
Some interval like stuff where we had to spend a certain amount of time at different cadences... one went up then down (30s,45s, 60s*90/95/100/105/110/105/100/95), the next went just up to a really fast cadence(2*30s*95/100/105/110/115/120), and the last started fast and went down (15s,30s*110/105/100/95/90)... or something like that.