Four core circadian behaviors that improve cardiorespiratory fitness through consistent sleep
Increased engagement in the Core Four behaviors was associated with improvements in sleep consistency, which in turn was linked to enhanced cardiorespiratory fitness and parasympathetic activity. This increased engagement persisted for at least 1 month postintervention, suggesting that integrating simple circadian-alignment practices into daily routines may support sustainable improvements in sleep regularity and health outcomes.
Authors
- William von Hippel (ORCID: https://orcid.org/0000-0001-9900-0868)
- Jamie M. Zeitzer (ORCID: https://orcid.org/0000-0001-6174-5282)
- Jeongeun Kim (ORCID: https://orcid.org/0000-0002-7274-2332)
- Kristen E. Holmes (ORCID: https://orcid.org/0000-0002-5771-9206)
- Finnbarr Fielding
Institutions
- The University of Queensland (AU)
- More Associates (GB)
- Impact (CA)
- Wheelock College (US)
- Stanford University (US)
Publication Details
- Journal
- SLEEP
- Published
- 2025-10-09
- DOI
- https://doi.org/10.1093/sleep/zsaf318
- Citations
- 1
- Primary Topic
- Behavioral Health and Interventions
- Type
- article
- Field-Weighted Citation Impact
- 1.54