Seasonal exposure

Seasonal exposure has been studied in 2 papers since 2016: 1 observational study in people, 1 in animals; 1 in the past year. The newest story, Oct 31, 2026: “Seasonal heart-rate swings were smaller in older adults”.

Exposure

2 papers study it4 findingsUpdated Oct 31, 2026

1 new paper in 30 daysSee all 2

“RHR and HRV showed robust seasonal patterns (lower RHR, higher HRV in summer than winter)”

Seasonal variation in resting heart rate and heart rate variability is attenuated with advancing ageNPJ aging2026doi:10.1038/s41514-026-00552-w

None of its findings points the other way.

2 independent labs

Humans1
Animals1

What is Seasonal exposure linked with?

Studies link Seasonal exposure with 4 measures, most often heart rate variability (1 study), resting heart rate (1) and testosterone (1).

Heart rate variability

upin humans1

1 study

Seasonal exposure is associated with heart rate variability in humans (summer compared with winter) (4.2 ms peak-to-trough seasonal amplitude).
“RHR and HRV showed robust seasonal patterns (lower RHR, higher HRV in summer than winter)”
Humanssummer compared with winterone yearn = 16,415
Seasonal heart-rate swings were smaller in older adults
NPJ agingOct 31, 2026

Latest

1 paper in 12 months

NPJ AgingOct 31

Seasonal heart-rate swings were smaller in older adults

Seasonal swings in resting heart rate were about 29% smaller, and swings in heart rate variability about 48% smaller, in older than younger adults.Seasonal swings in resting heart rate were about 29% smaller, and swings in heart rate variability about 48% smaller, in older than younger adults.

Cohort · 16,415 peoplePopulations

Paper

Fiziolohichnyi ZhurnalJan 1

THE STUDY OF THE RELATIONSHIP BETWEEN THE ACTIVITY OF EPIPHYSIS AND GONADS IN MALE RATS IN DIFFERENT SEASONS

Experiments in ratsMechanisms