40min build

Ran from south Perth into the CBD to pick up my car. Went out to fast and after 20min was running at 4.20min/k which meant tht the last 20 minutes were all run at 4.13, 4.09, 4.05, 4.03 and 3.58min/k. Turned into a mini tempo run and the lungs and legs were straining at the end.
All in all not a bad run but a reminder on how unfit I am at the moment.