Quote:
Originally Posted by Marcellus
Its more complicated than people think, while improving cardio without beating up the rest of your body because you aren't running hard, the Mitochondrial Density benefit is the biggest thing. Your ability to get oxygen into your muscles for energy is key.
Here is a quick break down on it.
https://www.trainingpeaks.com/blog/t...-mitochondria/
Every training plan I have I done for a marathon about 75% of the running was in zone 2 and the rest was tempo runs. The Zone 2 gets boring but it works and it doesn't tear up your body as much as running hard. |
It's the same concept as strength training (not body building.) You don't max out and often you never train at maximum levels in order to not burn out your CNS.
Over stressing will eventually lead to slower or even degrading gains and more susceptible to injury.