A common question I get is, "How much cardio should I be doing?" The internet hasn't made it easier. One source says Zone 2 is everything, another says only HIIT matters, and your watch says you hit your steps. So I'd to ask a better question: what are you actually trying to train? You may not need more cardio. You need to know what each kind is doing for you. Why Cardiovascular Fitness Matters for Longevity Cardiorespiratory fitness is how well your heart, lungs, blood vessels and muscles...

The science behind bone density and strength training, and why the "just lift heavy" message you've seen on social media is missing some important nuance. Here's a question I get more than almost any other from clients over 50: can I actually rebuild the bone I've lost? It's a fair question, and lately it has a very confident answer floating around social media: lift heavy, and your bones will get denser. I wish it were that simple. It's not false, but it skips a lot of the real story, and I...

Picture this: it's early December, you're on the mountain for your first ski day of the season, and your legs feel exactly as strong and confident as you hoped. Your knees aren't complaining. Your hips aren't stiff. You make it through the whole day feeling good. That experience doesn't start in December. It starts right now, in August, with training that most people overlook entirely. There's a version of fitness that looks great on paper: you lifted heavy, you hiked far, you logged the...