Musculoskeletal Syndrome of Menopause: Why You Ache All Over

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Musculoskeletal Syndrome of Menopause: Why You Ache All Over

Roughly 70% of women experience joint pain, stiffness, and muscle loss during perimenopause and menopause — yet most are simply told "it's just aging." The real cause is estrogen loss, which affects receptors in your joints, tendons, ligaments, muscles, and bones all at once. At HealthFit in Pasadena, Dr. Jason Han and Dr. Kelli Han treat both halves of the problem: the structural pain through their Hands-Exercise-Regen Stack from Day 1, and the metabolic shift through the Longevity Blueprint — testing resting metabolic rate, VO2 max, and body composition so your effort finally matches your results. You're not falling apart, and you're not out of options.

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Why Kids Are Getting Hurt in Summer Sports (and How to Protect Yours)

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Why Kids Are Getting Hurt in Summer Sports (and How to Protect Yours)

Every summer, healthy kids get sidelined — not from contact, but from a sudden spike in training load that nobody was tracking. Young athletes who train more hours per week than their age are roughly 70% more likely to suffer serious overuse injuries, and about half of all youth sports injuries are preventable. At HealthFit in Pasadena, Dr. Jason Han — with over a decade in professional sports including the Pittsburgh Steelers, Cirque du Soleil, and LAFC — uses his Source-Cause-Stack framework to treat the whole picture, not just the sore spot, and helps parents protect their young athletes with movement screens, load management, and recovery plans that keep them playing the sport they love.

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There's Now a Drug to Save the Muscle You Lose on Ozempic. The Fix You Already Have Is Cheaper.

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There's Now a Drug to Save the Muscle You Lose on Ozempic. The Fix You Already Have Is Cheaper.

Scientists are now developing a second drug just to rescue the muscle people lose on Ozempic — a pill to fix a side effect of another pill. But that compound is years from approval, and your muscle is disappearing now. At HealthFit in Pasadena, Dr. Jason Han offers the fix you already have: baseline VO2 max and InBody testing to see what your weight loss is actually made of, progressive resistance training to send your body the signal to keep the muscle, protein targets built off your lean mass, and re-testing to prove it's working. The future pill is trying to fake what lifting already does for free — and the people who benefit most from it will be the ones already doing the work.

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Carpal Tunnel: What to Try Before You Agree to Release Surgery

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Carpal Tunnel: What to Try Before You Agree to Release Surgery

About 600,000 carpal tunnel release surgeries are performed in the U.S. every year, yet a large share of those wrists never received a structured conservative trial first. At HealthFit Physical Therapy & Chiropractic in Pasadena, Dr. Jason Han treats the whole chain — from neck to hand — using his Source-Cause-Stack approach: nerve glides to free the compressed median nerve, posture correction to open the path from the top down, and regenerative therapies like EMTT and focused shockwave from Day 1 to calm inflammation and heal the tissue driving the problem. For mild-to-moderate cases, conservative care holds up well against surgery — without the incision or the recovery time.

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HBOT Before Surgery: The Four-Week Window Most People Miss

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HBOT Before Surgery: The Four-Week Window Most People Miss

Surgery is a controlled injury — and the tissue that heals best is tissue that walks in prepared. Hyperbaric oxygen therapy (HBOT) in the three to four weeks before your procedure can boost tissue oxygenation by up to 1,200 percent, help regulate the inflammatory response, and encourage new blood vessel growth in the areas your surgeon is about to work on. At HealthFit Physical Therapy & Chiropractic in Pasadena, Dr. Jason Han builds individualized pre-surgical optimization plans using multiple chamber pressure levels matched to your procedure, health history, and timeline — because the window to prepare is shorter than you think.

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Sleep and Longevity: Why the #1 Longevity Drug Is Free

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Sleep and Longevity: Why the #1 Longevity Drug Is Free

The world's most aggressive longevity spender — with daily blood draws, a team of doctors, and over a hundred interventions — still ranks sleep as his number one lever. At HealthFit Physical Therapy & Chiropractic in Pasadena, Dr. Jason Han explains why sleep is the foundation everything else is built on, how cutting it quietly costs you strength, aerobic capacity, and injury resilience, and what simple steps — tracking your deep sleep, cooling your room, and making one decision — can rebuild the repair window your body depends on.

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When to Schedule Your HBOT Session for Maximum Recovery

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When to Schedule Your HBOT Session for Maximum Recovery

If you're doing hyperbaric oxygen therapy and not timing your sessions, you're leaving recovery on the table. At two atmospheres of pressure, a hard chamber can raise tissue oxygen by up to 1,200% — but that signal is only as good as the moment you send it. At HealthFit in Pasadena, Dr. Jason Han gives patients four timing rules: get in the chamber within four hours of hard training to catch the repair window, prep tissue in the two to three weeks before a planned surgery, go in the morning when you need your brain sharp for a big day, and schedule sessions around long flights to land ready instead of wrecked. Same chamber, same oxygen, completely different results — all because of timing. HBOT doesn't heal you on its own. It amplifies whatever your body is already trying to do. The goal is to line up the session with the moment your body is doing the most work.

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Why We Test Patients Who Feel Completely Fine

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Why We Test Patients Who Feel Completely Fine

You feel fine. Your labs look fine. But in a study of over 120,000 adults, the least-fit group had five times the risk of dying early compared to the fittest — a bigger mortality gap than smoking, coronary artery disease, or diabetes. And almost none of them felt sick. At HealthFit in Pasadena, Dr. Jason Han tests what he calls the Silent Five: VO2 max, training zones, lean muscle mass, metabolic flexibility, and grip strength. None of them hurt. All of them matter. Every result maps onto your Longevity Blueprint — a precision health plan built from your real data, not a generic template. The patients he worries about most aren't the ones in pain. They're the ones who feel great and never look under the hood. Stop guessing. Test, don't guess.

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The Diseases of Aging Start Decades Before the Diagnosis (Here's Why You Test Now)

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The Diseases of Aging Start Decades Before the Diagnosis (Here's Why You Test Now)

During the Korean War, doctors found visible heart disease in 77% of soldiers killed in combat — average age twenty-two. No symptoms. No warning signs. The disease was already decades ahead of any diagnosis. That gap between when disease begins and when you finally feel it is where the real damage accumulates — heart disease starts as fatty streaks in the teens, Alzheimer's markers build fifteen to twenty years before the first memory slip, and lean muscle starts declining in your thirties. At HealthFit in Pasadena, the Longevity Blueprint measures what your body is actually doing right now — clinical-grade VO2 max, body composition including visceral fat, strength, balance, and movement quality — while you still feel fine. Because "fine" is exactly the window where you have the most leverage. Stop guessing. Start testing.

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HBOT for Brain Fog: What the 2026 Research Actually Shows

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HBOT for Brain Fog: What the 2026 Research Actually Shows

Brain fog isn't a diagnosis — it's a signal that something upstream is off, usually inflammation, poor sleep, chronic stress, or reduced blood flow to the brain. Hyperbaric oxygen therapy can deliver oxygen to sluggish tissue, calm inflammation, and support neuroplasticity, but the strongest results come from structured protocols in specific populations — not one-off sessions. In a randomized controlled trial of 63 healthy adults over 64, a course of 60 sessions at higher pressure produced measurable gains in attention and processing speed on objective neuropsychological testing. At HealthFit in Pasadena, HBOT is offered at three pressure levels — 1.3, 1.5, and 2.0 ATA — matched to your goal and tolerance, and it's never treated as a standalone fix. It sits inside an integrated plan that addresses sleep, movement, inflammation, and stress. Test, don't guess. Your brain isn't broken — it's running short. Give it what it's been missing, with a plan behind it.

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