The Claim
In patients with heart failure with preserved ejection fraction (HFpEF), higher hair cortisol concentration is strongly associated with greater self-reported physical activity levels (r = 0.91, p < 0.005).
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
In people with heart failure and normal pumping ability, higher levels of the stress hormone cortisol in hair are linked to higher self-reported physical activity levels.
See the scientific wording
Among patients with heart failure with preserved ejection fraction (HFpEF), higher hair cortisol concentration is strongly associated with greater self-reported physical activity levels (r = 0.91, p < 0.005), suggesting a unique physiological relationship between chronic stress biomarkers and activity behavior in this subgroup, which contrasts with findings in heart failure with reduced ejection fraction or combined HF.
When people with HFpEF move their bodies, their stress system turns on, causing the brain to signal the adrenal glands to release cortisol. This cortisol circulates in the blood and gets trapped in hair as it grows, so more activity leads to more cortisol stored in hair.
What the research says
1 studyIn people with a type of heart failure where the heart pumps normally, those who said they were more active had higher levels of a stress hormone in their hair — which is surprising, because we usually think stress makes people less active. This link wasn’t seen in other heart failure types.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.