Nadia Vern

HRV biofeedback may help some adults practise stress regulation, but the evidence is mixed and it should not replace anxiety or cardiac care.

HRV can reveal useful stress and recovery patterns, but only when read as a trend, not a diagnosis. Here is how to track it without overreacting.

A physiological sigh may briefly ease arousal, but the evidence supports a modest stress tool, not treatment for anxiety, panic, or breathlessness.

Cold exposure may help some people feel calmer or recover after exercise, but the evidence is narrow and the risks matter, especially for heart health.