Serial lactate measures also help assess response to therapy. The half-life of lactate is around 20 minutes, even in septic patients. If the lactate is persistently elevated, it's not because the body can't get rid of it, but because the body continues producing it, shifting to anaerobic metabolism.
That's because the Philadelphia Rock 'n' Roll Half Marathon, which has been run in the city for 38 years, has a new date for 2015, landing on Oct. 31.
Expand the distance of your long run to 2.5 miles. Further increase the length of your long run by 0.5 miles every two weeks until you are able to go 4 miles by week 14. Going farther than race distance will make the 3.1 miles on race day seem like a breeze.