The Effect of High-Intensity Exercise on Changes in Salivary and Serum Cortisol Proportion Dynamics
| Autor: | Nathaniel T. Berry, Laurie Wideman, Travis Anderson |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
medicine.medical_specialty
cycling lcsh:RC648-665 Total Cortisol business.industry High intensity 030209 endocrinology & metabolism lcsh:Diseases of the endocrine glands. Clinical endocrinology 03 medical and health sciences 0302 clinical medicine Endocrinology circadian Internal medicine medicine Cycle ergometer Circadian rhythm diurnal business hormones hormone substitutes and hormone antagonists 030217 neurology & neurosurgery Serum cortisol Salivary cortisol steroids |
| Zdroj: | Endocrines, Vol 2, Iss 5, Pp 44-53 (2021) Endocrines Volume 2 Issue 1 Pages 5-53 |
| Popis: | Typically, salivary cortisol is reported as 5–10% of total cortisol, but the stability of this proportion and the effect of exercise on the 24-h profile is unclear. Therefore, this study investigated the circadian rhythm of the proportion of serum cortisol represented by salivary cortisol, and the impact of acute high-intensity exercise. Recreationally trained males (n = 8, age = 25.7 ± 2.4 years, height = 174.7 ± 7.8 cm, mass = 69.8 ± 12.1 kg) completed two 24-h profiles (rest and exercise conditions) for serum (Q60) and salivary (Q120) cortisol. Exercise consisted of 5 × 30 s sprinting intervals on the cycle ergometer. Cortisol was assessed using commercially available assays. The proportion (Cprop) of serum cortisol (Cser) represented by salivary cortisol (Csal) was calculated as [Cprop = Csal/ Cser*100]. Multilevel growth models tested for trends across the 24-h profile. The highest relation between Cser and Csal was observed at 08:00 AM (r = 0.90). The average Cprop was 5.95% and demonstrated a circadian profile characterized by a cubic model. Acute exercise did not alter Cser, Csal, or Cprop. Thus, the proportion of Cser represented by Csal changes across a 24-h period and should be accounted for if using salivary cortisol to reflect circadian output of cortisol. |
| Databáze: | OpenAIRE |
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