Anyone here done the time crunched plans?

I just completed SSB1 and I suddenly have no time to ride, due to work commitments.

I do have 30 minutes a day and I’m wondering if I could maintain or gains some fitness from these short workouts??

I did the Time Crunch 45 at the beginning of the year following the birth of twins. Nice mix of workouts. You may lose some endurance due to lack of longer rides, but you can maintain your fitness. If on a given day you have some extra time, select a longer variant of the given workout.

Do 3 short 30/15 workouts a week and rest days 30 min 75%.

Do what your schedule will let you do. I downsize planned workouts whenever I can only squeeze in 30 or 45 minutes. Much better than nothing, right?