Muscle mass, strength, and power predict independence and mortality better than many lab values. Two to three full‑body sessions weekly, pushing close to technical failure, grow resilience in bones, tendons, and metabolism. Beginners progress on minimal volume; older adults thrive with good form and protein. Track consistency first, then load, reps, and rest intelligently.
Steady Zone 2 builds mitochondria, fat oxidation, and metabolic flexibility; HIIT boosts VO2max efficiently. Together they cover durability and performance. Aim for roughly 150 minutes of easy cardio plus one to two brief interval sessions weekly. Protect recovery windows around heavy lifting, and increase volume slowly to avoid plateaus, niggles, and burnout.