Why Your Metabolism Slows Down (and How to Speed It Up)
"Metabolism" is often blamed for failed weight loss attempts or fitness plateaus. But what does that really mean—and can we do anything about it? The answer is yes, and the key factor might surprise you.
Metabolic flexibility: myth or reality?
Your body should be able to switch easily between fuel sources: burning fat when you're fasting or at rest, then switching to carbohydrates when you eat or when the intensity increases. This ability to adapt has a name—metabolic flexibility—and it says a lot about your health.
Your biological age vs. your actual age
Imagine two 50-year-olds. One has the body, energy, and resilience of a 40-year-old. The other has those of a 65-year-old. Their birthdates are the same—but their biological age, which determines how long and in what condition they will live, is completely different.
Oxygen: The Ultimate Measure of Your Longevity
Most people exercise for a reason that goes far beyond what they see in the mirror: to live longer—and, above all, to live better. Yet few can say, with hard data to back it up, whether their routine is actually bringing them closer to that goal. That is precisely what oxygen—and the way your body uses it—allows us to measure.