Muscle mass is often discussed in the context of aesthetics, but for those of us focused on long-term performance and data-driven health, it is much more: it is your metabolic body armor. 🛡️ As we age, maintaining lean muscle mass becomes the #1 predictor of longevity and insulin sensitivity. It isn't just about strength; it's about how your body handles glucose and maintains hormonal balance. Why it matters: Insulin Sensitivity: Skeletal muscle is the primary site for glucose disposal in the body. Metabolic Rate: Muscle is active tissue that burns calories even at rest, acting as an insurance policy for your metabolism. Future Resilience: Strength training prevents sarcopenia (age- related muscle loss), ensuring you stay functional for decades. The Recommendation: Don't just "do cardio." While cardiovascular health is vital, your cells need the stimulus of resistance. The Goal: Lift something heavy at least twice a week. Your future self will thank you for building the armor you need today.…