Why Fat Tissue Becomes “Oxygen-Starved”—And Why It Matters for Your Health
Most people think of body fat as passive storage—just extra calories sitting around.
Posts about:
Metabolic Health
Iron, Oxygen, and the Edge Between Performance and Damage
At FITNESS SF, we talk about progressive overload, VO₂ max, strength adaptation, and recovery. This discussion is based on a 2023 systematic review examining how iron levels influence physical performance in athletes.
How Exercise Prevents Frailty and Fragility Fractures
Aging changes the body — but decline is not inevitable.
The San Francisco Hybrid Athlete: Stop Choosing Between Strength and Stamina
It’s April 2026. The "New Year, New Me" phase is over. The "Performance Phase" has begun.
