Vol. 01 / 2026
Evidence-based notes on living longer, better

Healthspan is the goal.
Not just lifespan.

A premed student's running log of the science behind longevity: resistance training, metabolic health, sleep architecture, and the habits that compound over decades.

The deal: you read, you lift, you sleep, you eat protein. We don't sell supplements. We don't biohack. We just read the papers and share what seems to actually work.
24
Essays Published
04
Core Pillars
150+
Papers Cited
01
Long Game
AGE 30 AGE 80 HEALTHSPAN
~50%
Reduction in muscle mass between ages 40 and 80 in sedentary adults, a process called sarcopenia.
Higher all-cause mortality in the lowest cardiorespiratory fitness group vs. the highest, in a cohort of 120,000+ patients.
7 hrs
The sleep duration associated with lowest all-cause mortality. Both shorter and longer durations carry higher risk.
§ 01 — Start here

The essay everyone should read first.

If you only read one thing on this site, read this one. It's the argument that underpins almost everything else.

§ 02 — The 80/20 of healthspan

Four pillars. Click any to go deeper.

The whole site is organized around these four domains. Every essay belongs to one. If you're here to actually do something rather than just read, pick the pillar you're weakest in and start there.

01 / Move

Resistance Training

→ 2× lower mortality in highest strength tertile

Strength, muscle mass, and bone density all decline with age. Lifting is the most durable countermeasure we know of, and it's dose-dependent.

02 / Breathe

Cardiorespiratory Fitness

→ VO₂ max predicts mortality better than smoking

VO₂ max correlates with all-cause mortality more strongly than almost any other modifiable factor. Zone 2 plus occasional high-intensity work moves the needle.

03 / Recover

Sleep Architecture

→ 7 hrs linked to lowest mortality

Deep sleep consolidates memory, clears metabolic waste, and restores metabolic function. Protecting the first half of the night matters more than total hours.

04 / Fuel

Protein & Nutrition

→ 1.6 g/kg target for muscle preservation

Adequate protein intake becomes non-negotiable after 40. What you eat matters less than consistency, fiber, and a daily protein floor most people never hit.

Not sure where to start?

Answer one question. Get pointed to the essay most worth your time given what you're already doing (or not doing).

Quick question
Which of these are you most neglecting right now?
→ Your next read
§ 03 — All writing

Essays, notes, half-formed thoughts.

Filter by pillar to see a specific track. Each essay cites primary literature at the bottom.

About the person writing this.

I'm Erik, a premed student fascinated by the gap between what we know about aging biology and how little of it filters into clinical practice. This site is where I process what I read, mostly for my own benefit, and publish the versions I think might be useful to someone else.

I'm not a doctor yet. I'm not an influencer. I don't sell supplements or courses and I don't plan to. The goal is straightforward: translate research on longevity and healthspan into something readable, honest about uncertainty, and actionable enough to matter.

Most of what I write comes from reading peer-reviewed papers, textbooks, and the occasional podcast with an expert who does primary research. When I'm uncertain, I say so. When something contradicts a previous post, I update it. That's the whole editorial policy.

A short essay, once a week.

No spam, no affiliate links, no "quick tips to biohack your mitochondria." Just one carefully researched piece in your inbox every Sunday.

Longevity Notes / Essay
Pillar