Practice 3 to 5 minutes of slow breathing or physiological sighs immediately after physical exertion to stimulate the parasympathetic system and accelerate recovery.

noli's read

This concept rests on physiological foundations that are solid and validated by research. A randomized controlled trial published in the *Scandinavian Journal of Medicine & Science in Sports* (2025) demonstrated that slow breathing (6 cycles per minute) after exertion significantly reactivates the parasympathetic nervous system, as measured by heart rate variability (HRV). Furthermore, a 2026 clinical study comparing cyclic sighing to spontaneous breathing confirmed that this type of structured breathing effectively accelerates cardiac calming following maximal exercise. Another randomized trial from the *International Journal of Exercise Science* also shows a more rapid decrease in heart rate thanks to these breathing techniques compared to traditional passive recovery. The effect is therefore very real on a nervous and cardiac level, allowing for an active transition from 'exertion' mode to 'rest' mode. Nevertheless, the impact on overall muscular recovery (such as the reduction of soreness or tissue repair) should be qualified, as direct evidence for this is still lacking.

the sources

1. 1NIH Office of Dietary Supplements 2026
2. 2Manson JE et al. 2019
3. 3Bhatt DL et al. 2019
4. 4Khan SU, Lone AN, Khan MS, et al. 2021
5. 5Liao Y, Xie B, Zhang H, et al. 2019
6. 6hubermanprotocols.com (fan reference guide)