Why Are Workout And Race Times Different?

  • By Jeff Gaudette
  • Published Oct. 31, 2013
There is a lot of science behind improving your run times. Photo:

Mitochondria Density

On the other side of the spectrum regarding mitochondria development is their density (the size of each mitochondrial). Like volume, mitochondria density can be developed with both slower and faster training sessions. However, mitochondria density is more effected by training volume — the more you run, the faster you will increase the density.

Unlike mitochondria volume, which can be developed infinitely, there is an absolute mitochondrial density that each individual can attain, usually reached after 8-12 weeks of training. Not surprisingly, this time frame usually correlates with when you start “feeling fit” during your training segment.

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Jeff Gaudette

Jeff Gaudette

Jeff has been running for 13 years, at all levels of the sport. He was a two time Division-I All-American in Cross Country while at Brown University and competed professionally for 4 years after college for the Hansons-Brooks Distance Project. Jeff's writing has been featured in Running Times magazine, Endurance Magazine, as well as numerous local magazine fitness columns.

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