The Over 40 Playbook

Turn 40 with intention and thrive for decades to come.

Your twenties were fueled by energy, your thirties by ambition. Now, in your forties and beyond, success demands strategy. The Over 40 Playbook is your step-by-step blueprint to optimize health, performance, and purpose in midlife. Drawing from the latest research in exercise physiology, and neuroscience, Dr. Michael S. Day distills complex science into clear, actionable “plays” that deliver results.

Inside you’ll discover:

How to use movement as medicine to preserve strength, mobility, and enduranceEvidence-based nutrition and supplementation strategies to sustain energy and recoverySmart hormone optimization — understanding testosterone, metabolism, and sleepLab checklists and health metrics every man and woman over 40 should trackHow to cultivate resilience, mindset, and meaning for lifelong performanceEvery chapter ends with a concise checklist so you can apply the principles immediately. No guesswork, no gimmicks, just proven science translated into a personal roadmap. Whether you want to reclaim athletic performance, outsmart aging, or build a legacy of vitality, this book gives you the plays that work.

Don’t wait for decline. Build your resilience, master your recovery, and take command of your future.