On a bike? How does that even work?
4 x 4 minutes with 4 minutes rest. The classic VO2max exercise. I've always called them 4by4s.
And by forever I mean, for the next many months.
Should listen to the song while you do them.
It was a Superbowl commercial song: https://www.youtube.com/watch?v=pOiiPxb-Gbw&fe...
I watched that and immediately afterward bought a Jeep!
I will download that song and play it with two minutes to go before my first one, just for you guys.
Haha I read 4x4s as "four by four seconds"
Yes, that is a logical conclusion given I also wrote 1min.