Here's the program:
2 minute warm up
20 seconds flat out cycling
2 minute recovery cycle
20 seconds flat out cycling
2 minute recovery cycle
20 seconds flat out cycling
3 minute cool down
That's it!
That's it!
Basically 3 lots of 20 second high intensity followed by 2 minutes of normal cycling.
Here's the free audio playlist:
Here's the background info and research:
Medical News Today
https://www.medicalnewstoday.com/articles/242498#Simple-Program
https://www.medicalnewstoday.com/articles/242498#Simple-Program
Mens Journal