The Headaches That Actually Start in Your Neck (And Why You Keep Medicating the Wrong Thing)

/ HealthFit/
The Headaches That Actually Start in Your Neck (And Why You Keep Medicating the Wrong Thing)

If your headache always starts at the base of your skull and rides up one side, it may not be starting in your head at all. Cervicogenic headaches are driven by the upper cervical spine — where neck nerves and head nerves share the same relay station in your brainstem. At HealthFit in Pasadena, we use the Source-Cause-Stack framework to trace the pain back to the upper neck joints, address the posture, thoracic stiffness, and shoulder imbalances driving it, and deploy Hands + Exercise + Regen from Day 1 to shut it off at the source.

Read More

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

/ HealthFit/
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.

Read More

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

/ HealthFit/
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.

Read More

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

/ HealthFit/
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.

Read More

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

/ HealthFit/
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.

Read More

When to Schedule Your HBOT Session for Maximum Recovery

/ HealthFit/
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.

Read More

HBOT for Brain Fog: What the 2026 Research Actually Shows

/ HealthFit/
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.

Read More

GLP-1 Was Found Inside Arthritic Joints. Here's What That Means for Your Knee.

/ HealthFit/
GLP-1 Was Found Inside Arthritic Joints. Here's What That Means for Your Knee.

In 2026, researchers in Denmark found GLP-1 — the same hormone mimicked by Ozempic and Wegovy — sitting inside the synovial fluid of arthritic joints, along with the enzyme that regulates it. It was the first time this hormone had been documented inside the knee. Patients on these medications are reporting real pain relief, backed by the STEP 9 trial in the New England Journal of Medicine. But those same patients also lost nearly 14% of their body weight — and every pound translates to several pounds of force through the joint. Whether the relief comes from the drug acting on the joint or from the weight coming off is still being worked out. At HealthFit in Pasadena, Dr. Jason Han treats knee arthritis through the Source-Cause-Stack — hands-on care, targeted loading, and regenerative therapy with EMTT, focused shockwave, and radial pressure wave from Day 1 — because waiting for a magic shot isn't a plan. Your knee is sending you a message. The source is the tissue. The cause is upstream. Treat both, together, from the start.

Read More

Pickleball Shoulder: The Overhead Smash Injury Nobody Treats Right

/ HealthFit /
Pickleball Shoulder: The Overhead Smash Injury Nobody Treats Right

If your shoulder started hurting after a pickleball smash, there's a real chance the rotator cuff was already torn before you ever picked up a paddle. Research shows nearly one in four pain-free adults over fifty has a rotator cuff tear on imaging — pickleball just exposed it. Every overhead smash, serve, and backhand drive loads a shoulder that was already on borrowed time, especially when scapular control has declined, the thoracic spine is stiff from decades of desk work, and the trunk can't transfer force the way it should. At HealthFit in Pasadena, Dr. Jason Han treats pickleball shoulder through the full kinetic chain — shoulder blade mechanics, thoracic mobility, cervical function, core stability, and lower-body power transfer — while using EMTT, focused shockwave, and radial pressure wave to heal the degenerated tendon tissue and even disperse calcific deposits from Day 1. Your shoulder didn't break the day it started hurting. It broke down over years. Treat the tissue and the chain together, from the start.

Read More

Hamstring Tears Are Spiking in 2026 — Here's Why, and What to Actually Do About It

/ HealthFit /
Hamstring Tears Are Spiking in 2026 — Here's Why, and What to Actually Do About It

Hamstring tears are surging in 2026 — from elite sprinters to weekend runners and pickleball players coming back too fast. And nearly one in three come back within a year, often worse than the first. The reason? Most rehab treats the sore spot and stops there. At HealthFit in Pasadena, Dr. Jason Han — former head of rehab for LAFC — uses a pro-sports approach: no waiting, no resting and hoping, and no skipping the kinetic chain. The tear is the source, but the cause is almost always upstream — a stiff lower back, glutes that don't fire, and eccentric strength that ran out. Using the healing stack of hands-on therapy, targeted eccentric loading, and regenerative therapy with EMTT, focused shockwave, and radial pressure wave from Day 1, the goal isn't just stopping the pain. It's rebuilding the chain so the hamstring never gets hung out to dry again.

Read More