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Moins de course, mais un meilleur cardio ? 🤔 C'est ce que j'ai vécu à l'époque du triathlon, et ça m'a

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what it claims

Cross-training (cycling, swimming) allows you to increase your overall aerobic volume and improve your cardio, but it cannot completely replace running for making specific progress in that discipline.

holds up

This advice is based on well-established principles in sports physiology: while cycling and swimming effectively improve cardiovascular capacity (VO2max) without the impact of…

noli's read

This advice is based on well-established principles in sports physiology: while cycling and swimming effectively improve cardiovascular capacity (VO2max) without the impact of running, they do not engage the exact same muscle chains, nor do they prepare for the specific demands of the running stride. Research confirms that the transfer of performance is real but limited, as progress in running also depends on neuromuscular adaptations specific to impact and running economy. Cross-training is therefore an excellent supplement for increasing overall volume and promoting recovery, or for use in the event of injury, but it does not replace the specific sessions (running paces and intensities) necessary to maximize results in running. These observations are supported by the practical experience of coaches and sports physiologists, validating the idea of an indirect and structural benefit. The statement is not exaggerated; it reflects a balanced view that avoids the '100% running' dogma while acknowledging the reality of biological specificity.

the sources

Claimed by Running Addict. Noli grades the claim, never the person.

Decoded by Noli · July 18, 2026 · the original post

What the graded evidence says

Evidence: C

Effect: endurance performance (VO2max, time trial) polarized vs threshold intensity distribution — polarized modestly favored in a small meta-analysis (only 3-4 RCTs); a larger 2024 review found no clear superiority over other distributions
Measured on: trained endurance athletes (>2 years experience); mechanistic mitochondrial data in adults

The head-to-head evidence for a specific intensity split is limited to a handful of small trials with mixed results, so precise prescriptions like exact Zone 2 percentages shouldn't be treated as settled science.

Running Addict in the Register102 claims graded · solidity 95/100See their record →