Sources and Research Policy
Why Sources Matter
IGoLong is a project documenting healthspan after 40 through measurement and long-term observation.
The goal of the site is not to publish quick health tips or trending advice. Instead, it focuses on understanding how sleep, nutrition, training, recovery, and biomarkers influence long-term health and performance.
Whenever possible, statements related to physiology, sleep, metabolism, or longevity are supported by peer-reviewed scientific research, academic publications, and reputable medical institutions.
Articles may also include documented personal data, such as wearable metrics or tracked health indicators, but these observations are clearly distinguished from scientific evidence.
Types of Sources Used
Articles on IGoLong may reference several types of sources:
- Peer-reviewed scientific research
- Meta-analyses and systematic reviews
- Large cohort studies and longitudinal research
- Clinical guidelines and consensus statements
- Publications from major scientific journals
- Research summaries from established medical institutions
Whenever possible, primary sources are preferred over summaries or secondary interpretations.
Scientific Databases and Research Platforms
Many of the scientific papers referenced on this site come from large academic databases such as:
- PubMed – https://pubmed.ncbi.nlm.nih.gov
- National Institutes of Health (NIH) – https://www.nih.gov
- World Health Organization (WHO) – https://www.who.int
- ScienceDirect – https://www.sciencedirect.com
- Nature Publishing Group – https://www.nature.com
- The Lancet – https://www.thelancet.com
- British Medical Journal (BMJ) – https://www.bmj.com
These platforms host peer-reviewed research used by scientists, physicians, and academic institutions worldwide.
Examples of Research Referenced in Articles
Below are examples of research topics frequently referenced on IGoLong:
Sleep and Recovery
Sleep duration and cardiovascular health
https://pubmed.ncbi.nlm.nih.gov/32668565
Sleep quality and mortality risk
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5449130
Exercise, VO₂ Max and Longevity
Cardiorespiratory fitness and mortality risk
https://jamanetwork.com/journals/jama/fullarticle/2707428
VO₂ max as a predictor of long-term health
https://pubmed.ncbi.nlm.nih.gov/29293447
Nutrition and Healthspan
Micronutrient intake and health outcomes
https://www.ncbi.nlm.nih.gov/books/NBK597352
Nutrition and chronic disease prevention
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2585731
Personal Metrics and Experiments
IGoLong also documents personal health data collected over time.
Some articles may include observations based on:
- wearable biometric devices
- sleep tracking systems
- recovery and strain metrics
- body composition measurements
- laboratory blood biomarkers
These measurements are part of a long-term personal experiment in healthspan optimization.
They are presented as observations and documented experiences, not universal medical recommendations.
Limitations of Scientific Research
Scientific understanding evolves continuously.
Individual studies may later be refined, challenged, or expanded by new research. For that reason, IGoLong aims to:
- cite reliable research
- avoid exaggerated claims
- separate evidence, interpretation, and personal experience
When possible, readers are encouraged to review the original research papers linked in the articles.
Not Medical Advice
Content on IGoLong is intended for educational and informational purposes only.
It does not replace professional medical advice, diagnosis, or treatment.
Readers should consult qualified healthcare professionals before making decisions related to health, training, or medical conditions.
Last Updated
March 2026