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.
Therefore the field travels the distance at approximately 33 mph. The longest race in our calendar is the Grand National, run at Liverpool in April over 4m 4f. The record time for this contest is 8 min 47 sec, achieved on fast ground. Therefore the winner travelled at 31 mph (jumping 30 fences in so doing).