How many sauna sessions per week produce health benefits?
Even 2 to 3 sessions per week is associated with measurable health benefits; those who go 4 or more times appear to benefit even more, though in practice most people do not reach that frequency.
Even at 2 to 3 sessions per week, large long-running observational studies show lower rates of high blood pressure, cardiovascular disease, and premature death. At 4 or more sessions per week the effect is larger, but these are associations, not proven causal relationships.
The most striking figure comes from a study of nearly 2,000 men followed for more than 25 years. Those who visited the sauna 2 to 3 times per week had a 27% lower chance of respiratory conditions such as COPD and asthma. Those who went 4 or more times had a 41% lower chance. Note: this study looked only at middle-aged men.
Sauna use and regular exercise reinforce each other. People who both exercised regularly and visited the sauna 3 to 7 times per week had a 58% lower chance of dying from cardiovascular disease than people who exercised little and rarely went to the sauna. Sauna use alone (3 to 7 times per week) was associated with 26% lower cardiovascular mortality. Sauna is therefore not a substitute for exercise.
For mental well-being, a survey of 482 regular sauna users found that 5 to 15 sessions per month were associated with a slightly better mental score than fewer than 5 sessions. This involved self-reported data, not a clinical study, so the outcome is indicative. For physical well-being there was no difference.
One randomised study (38 participants, 8 weeks) examined whether sauna after exercise improves recovery. Measurement via heart rate variability showed no additional benefit over exercise without sauna. This puts into perspective the popular claim that sauna measurably speeds up post-exercise recovery.
Safety deserves attention. Fatal incidents in the sauna are rare but occur more often in people who have been drinking alcohol, who sauna alone, or who have a serious heart condition. If you have a heart disease or another serious condition, discuss it with your doctor first.
All claims are based on observational or prospective cohort studies (in part involving men only), supplemented by one small RCT. There is no proof of causality for the long-term effects. The studies come largely from Finland, which limits their generalisability to other populations.
Does regular sauna use help you live longer?
Large studies show that regular sauna use is linked to better heart health and lower death rates. The effects on blood pressure and exercise capacity in heart failure are the best supported.
How bad is eating a lot of salt for me?
Eating a lot of salt is clearly harmful to your blood pressure and your heart, and the risk grows with the amount consumed. Eating more vegetables and fruit helps to temper the effect, but does not replace reducing salt intake.
Does taking omega-3 help you stay healthy for longer?
Omega-3 reliably lowers blood fats, but the evidence that it helps you live longer or stay healthier is limited. If you already have heart disease, discuss with your doctor whether omega-3 is a worthwhile addition to your treatment.
Does having a pet help your health and longevity?
Several large analyses show that people with heart disease who own a pet run into new problems less often. For older adults there are also positive links with mental health and staying active.
Do you live longer if you eat more salt?
Eating more salt does not lead to a longer life. At the individual level, it demonstrably increases the risk of cardiovascular disease, and salt restriction lowers blood pressure and the risk of premature death.
Is loud snoring dangerous for my health?
Loud snoring is linked to serious health risks: hardening of the arteries, a higher chance of dying after a heart attack, and dangerous daytime sleepiness. If you snore loudly on a regular basis and feel tired during the day, get it checked by your GP.