It is a hot day across the US today, so make sure that you hydrate. The tempo run will feel much harder today, so be careful, drink lots of water before and after the run today and cooldown.
Saucony RBR Summer Mileage Program, Week Eleven, Day Two
Tuesday: 1-mile warm up, 20-minute tempo run, 1-mile cool down.
To determine your tempo run pace, add a half-minute to your present mile pace for a 5K. So if you can run 18:30 for a 5K now, that means a 6:00 pace. Add 30 seconds and your tempo run pace is 6:30-per-mile.