Running performance is often associated with extreme lightness.
However, more and more hybrid athletes are shattering records:
- CrossFit & HYROX Runners
- Former football or rugby players
- Muscular athletes who have transitioned to endurance sports
- “Strength + cardio” athletes
These profiles share several characteristics:
- More muscle mass
- More force per stride
- A much higher oxygen demand
- More abrupt spikes in heart rate
Result ?
Breathing becomes the primary limiting factor.
The legs can keep up.
The mental aspect is present.
But the air is no longer entering quickly enough.
And that's where many collapse.