Laughter Yoga, Cortisol, and Menopause: What a Trial Shows
A 64-person trial linked laughter yoga plus self-care education to lower salivary cortisol and menopausal symptoms. Which part drove change remains unknown.
Jet Lag for Athletes: Why Eastbound Travel Hits Harder
Travel fatigue and jet lag are different problems for athletes. Learn why eastbound travel can impair performance longer and which countermeasures have evidence.
Outdoor Rehab Gets Older Adults Moving, but Fear Persists
Outdoor rehabilitation can increase physical activity in older adults, yet fear of falling often remains. What the evidence says—and what trials still miss.
Slow-Wave Sleep May Affect Insulin Resistance Before Glucose
A first RCT meta-analysis found disrupted slow-wave sleep raised insulin resistance without raising glucose. What that means—and what remains unproven.
Probiotics for Stress: Small Effects, Weak Sleep Evidence
Can probiotics ease stress or anxiety? A 2026 meta-analysis finds small cortisol and psychological effects, but sleep and inflammation claims fall short.