Notes
3:1 intervals x 10. First run indoor on treadmill. Felt occasionally like I was breathing hard but not too bad. Did not wear pulse rate monitor. A little hot in gym. Speed ranged from 4.7 mph to 5.0 mph, with 4.7-4.8 being the norm. Did one 6.0 run at the end. 12:30-12:45 min/mile on average. Distance is only approximate since I didn't look at distance on treadmill.