I'm an endurance runner. This journal tracks my performance since the addition of circuits and spinning into my training. Always keep pushing. You will never know your limits unless you go looking for them.
In light of my recent reminder that I like HIIT workouts, I put one together and did it this morning. It was fun, fast, and very sweaty.
Warm Up: 10min, repeat the following set
HIIT: 18 min of 50/10 rounds