Marathonyogis

The Adverse Effects of Meditation: What the Research Says     What You'll Discover in This Post - Why up to 1 in 3 meditators report unwanted side effects - The most common adverse experiences (anxiety, numbness, dissociation) - What a "Dark Night of the Soul" actually feels like—and when it becomes a crisis - Rare but serious outcomes: mania, psychosis, and trauma reactivation - Who is most at risk and why intensity matters more than you think - Practical, evidence-based guidelines for safer meditation - How to find the middle ground between "miracle cure" and "dangerous practice"   We've all seen the photos: a serene person on a cliff at sunrise, palms facing the sky, looking like they've solved the riddle of the universe. Or the app notification pinging your phone: "Just 10 minutes a day to a happier, healthie...

Yoga Nidra & Joint Repair:   Beyond Sleep: The Neuro-Endocrine Science of Yoga Nidra for the 50+ Marathoner   The Biological 'Recovery Gap' in Master Athletes As we cross the age of 50, the physiological cost of doing business on the pavement increases exponentially. For the master marathoner, the primary barrier to performance is no longer aerobic capacity or muscular strength — it is the Recovery Gap. In our 20s and 30s, the body exists in a state of high anabolic resilience. Post-run inflammation is cleared quickly by a robust lymphatic system. Muscle protein synthesis peaks within hours, and joints receive a steady supply of synovial fluid, enriched with chondrocyte-stimulating growth factors. However, by the half-century mark, our HPA-axis (Hypothalamic-Pituitary-Adrenal) becomes hyper-sensitized. Even a moderate Zone 2 run can trigger a cortisol spike that lingers for 6–8 hours, disrupting the natural circadian rhythm and preventing the deep, slow-wave s...

The Collagen Synthesis Myth:  Chondrocyte Biology and Why Your Collagen Supplement Is Only Half the Story   The Biochemistry of Articular Cartilage Collagen is the most abundant protein in the human body, and for the master marathon runner, it is the structural foundation of every joint under load. Articular cartilage — the smooth, white tissue that cushions the ends of bones in your knee, hip, and ankle — is composed of approximately 60% water and 30% type II collagen fibrils, embedded in a proteoglycan matrix. The cells responsible for manufacturing and maintaining this matrix are chondrocytes, and understanding their biology is the key to unlocking real joint longevity. Here is the myth: that simply taking a collagen supplement will rebuild your cartilage. The biological reality is more nuanced. Oral collagen peptides, once digested, are broken down into their constituent amino acids — primarily hydroxyproline, glycine, and proline. These amino acids can then be u...