The evidence behind the pillars of wellness
Exercise, sleep, nutrition, social connection and stress: what large studies and official guidelines actually say.
VALREXA Biosciences · 10 min read · November 2026
- Physical activity has some of the strongest and most consistent evidence for longer, healthier life.
- Adults are advised to get at least 150 minutes of moderate activity a week plus two days of strength training, and at least 7 hours of sleep.
- Social connection is linked to survival about as strongly as many well-known risk factors.
1. Physical activity
The U.S. Physical Activity Guidelines for Americans (2nd edition) recommend that adults get 150–300 minutes of moderate aerobic activity, or 75–150 minutes of vigorous activity, each week, plus muscle-strengthening activity on at least two days. Older adults should add balance training. In large cohort studies, higher cardiorespiratory fitness is linked to lower death rates across the whole range measured, with no clear upper limit.
2. Sleep
The American Academy of Sleep Medicine and the Sleep Research Society recommend that adults sleep 7 or more hours a night regularly. Consistently short sleep is linked to obesity, diabetes, heart disease, depression and impaired immune function. Regular timing and treatment of sleep disorders such as sleep apnea also matter.
3. Nutrition
Dietary patterns rich in vegetables, fruit, legumes, whole grains, nuts and olive oil have the strongest evidence. In the PREDIMED trial in Spain, a Mediterranean diet supplemented with extra-virgin olive oil or nuts reduced major cardiovascular events by about 30% compared with a reduced-fat control diet. Protein needs matter more with age to preserve muscle.
4. Social connection
A 2010 meta-analysis of 148 studies and more than 300,000 people found that stronger social relationships were associated with a 50% higher likelihood of survival over the study periods. In 2023 the U.S. Surgeon General issued an advisory on the health effects of loneliness and isolation.
5. Stress and mental health
Chronic stress affects blood pressure, sleep, inflammation and behavior. Approaches with good evidence for reducing stress and improving well-being include exercise, cognitive behavioral therapy and mindfulness-based programs.
6. Avoiding the big risks
Not smoking, limiting alcohol, and managing blood pressure, cholesterol, blood sugar and weight remain among the most powerful, best-proven steps. Screening and vaccination recommended for your age also add healthy years.
How strong is this evidence?
| Pillar | Main evidence type | Confidence |
|---|---|---|
| Not smoking | Large cohorts; overwhelming consistency | Very high |
| Physical activity | Large cohorts; trials on risk factors | High |
| Blood pressure control | Randomized trials | High |
| Dietary pattern | Cohorts plus some large trials | Moderate to high |
| Sleep | Cohorts; experimental sleep studies | Moderate |
| Social connection | Cohorts and meta-analyses | Moderate |
Most lifestyle evidence comes from observational studies, which can show strong links but not always cause and effect. See The evidence pyramid.
Sources and further reading
- HHS: Physical Activity Guidelines for Americans, 2nd edition
- AASM: How much sleep do adults need?
- Estruch et al. 2018. PREDIMED (corrected). NEJM
- Holt-Lunstad et al. 2010. Social relationships and mortality risk. PLoS Medicine
- U.S. Surgeon General: Our Epidemic of Loneliness and Isolation (2023)
VALREXA Biosciences. (2026, November 7). The evidence behind the pillars of wellness. VALREXA Biosciences. https://valrexa.com/longevity/wellness-pillars.html
APA style · Last reviewed November 7, 2026 · Our editorial standardsEducational content, not medical advice. Talk to a qualified healthcare professional before making changes to your health routine.