Week 9: Why You Feel 25 in July and 90 in February

Hey {{first name | reader}},

San Francisco has entered its classic winter personality: cold, wet, and relentlessly gray with the occasional burst of sunshine.¹

In January, I was frolicking in the Sydney summer feeling like a well-oiled machine. Now it’s March, 50 degrees, raining sideways, and my joints have filed several formal complaints.

This week’s topic:

Why Your Joints Hurt More in Cold Weather (and What Actually Helps)

If your knees, hips, shoulders, or back feel worse in winter, you’re not being dramatic. Cold weather really can make joints feel cranky. There’s actual physiology behind this — not just collective whining.

Bad news: You can’t control the weather.
Good news: You can control how your body responds to it.

Also good news: This is not a “buy these seventeen supplements” situation.²

Researchers still debate the exact mechanisms, but several explanations consistently show up:

1. Barometric Pressure Changes

When weather systems shift, pressure drops. That change can slightly affect tissues around joints, which may irritate nerves in sensitive areas.

This is why some people claim their knees predict storms. It sounds mystical. It isn’t. It’s just physics plus inflammation.

2. Synovial Fluid Gets Less Cooperative

Synovial fluid is your built-in joint lubricant. In colder temperatures, it becomes more viscous.

Translation: things feel stiff and sticky until you warm up.

This explains the familiar winter experience of moving like a rusty gate for the first few minutes of the day.

3. Winter = Less Movement

Cold, dark mornings subtly reduce activity. You walk less. Sit more. Delay moving.

Less movement → more stiffness → louder joint complaints.

This is not a moral failure. It’s just human behavior interacting with weather.

4. Cold Muscles Stabilize Poorly

Cold muscles tend to be tighter. Tight muscles don’t absorb force or stabilize joints as well.

Jumping straight into activity while physically cold is an excellent way to make everything feel worse.

Nothing exotic here. Just boring, effective basics.

Move Early

Gentle morning movement makes an outsized difference.

You don’t need heroics. Even 10–15 minutes helps. Think “convince your joints to rejoin society.”

My typical approach:

Reach arms overhead
Slow forward fold toward the floor
A few shoulder rolls
Done

Not elegant. Surprisingly effective.

Warm Up Longer Than You Want To

Winter bodies need more runway.

Summer warm-up: 5 minutes
Winter warm-up: 10–15 minutes minimum

Yes, it’s annoying. Yes, it works.

General structure:

Light cardio
Big easy joint circles
Unloaded squats / lunges / arm movements
Then training

Stay Warm On Purpose

Warm joints feel better than cold joints. This is deeply uncontroversial but widely ignored.

For outdoor movement:

Wear layers
Cover knees
Bring gloves
Remove layers later if needed

I essentially dress like someone preparing for a mild Arctic expedition.

Heat After Training

Hot showers help reduce that immediate post-workout stiffness.

Not a cure. Just reliable relief.

Saunas are great if available. Baths remain controversial in my household.³

Keep Lifting

Unless you’re dealing with a genuine injury, backing off strength training because of seasonal stiffness usually backfires.

Stronger muscles stabilize joints better. Stable joints complain less over time.

Stiffness that improves with movement → generally fine
Sharp, worsening pain → different story

Eat Like an Adult

No miracle foods. Just fewer inflammatory landmines.

Helpful patterns:

Fatty fish
Berries
Leafy greens
Nuts / seeds
Less ultra-processed chaos

Diet won’t fix everything, but it rarely makes things worse.

I’ve been training for decades and have accumulated the usual collection of structural drama: torn things, inflamed things, mysteriously irritated things.

In warm weather, my joints are mostly silent.

In cold weather, they become highly opinionated.

But they still work.

That’s the real objective: not pristine joints, just functional ones that let you keep doing things you enjoy.

Perfection is unnecessary. Usability is enough.

"Should I take joint supplements like glucosamine or fish oil?"

Fish oil (Omega-3s): Maybe. If you don't eat fatty fish regularly, supplementing with a high-quality fish oil can help reduce systemic inflammation. Some evidence supports this for joint health. Aim for 2-3g of combined EPA/DHA per day.

Glucosamine/Chondroitin: Probably not worth it. The research is mixed at best, and most studies show no significant benefit for mild to moderate joint pain. If you have severe osteoarthritis, it might help slightly, but don't expect miracles.

Collagen: Save your money. There's no good evidence that oral collagen supplements rebuild joint cartilage. You're better off eating enough protein and strength training.

Turmeric/Curcumin: Weak evidence for mild anti-inflammatory effects. If you like it, fine. But it's not a joint pain cure.

What I actually take: Fish oil (2g/day), Vitamin D (because I live in San Francisco and don't see enough sun), and that's it. Everything else is just eating well, moving consistently, and managing inflammation through training and lifestyle.

Myth: Cold weather causes arthritis.

Reality: Cold weather does not create arthritis. It just makes existing sensitivities more noticeable

Arthritis is caused by genetics, age, previous injuries, and wear-and-tear over time—not by being cold. People in warm climates get arthritis at the same rates as people in cold climates.

If your knees hate February but love July, your joints are reacting — not deteriorating in real time.

Simple, repeatable, zero drama:

This isn't magic. It's just nutrient-dense food that doesn't promote inflammation. Tastes good, easy to throw together, and supports long-term joint health better than popping supplements.

Article: "Is Joint Pain Worse in Cold Weather?" - University Hospitals

Excellent breakdown of why cold weather affects joints, including the synovial fluid explanation (it thickens like egg whites in cold weather). Covers both the science and practical tips for managing weather-related joint pain. Much more thorough than most articles on this topic.

15-Minute Morning Movement

Before phone. Before email. Before mental noise.

5 min gentle movement
5 min dynamic mobility
5 min easy bodyweight exercises

Tiny investment. Disproportionate return.

Winter joints love consistency more than intensity.

Stay strong, {{first name | reader}}

P.S. I'm not a martyr— I deeply dislike being cold and wet. I remain committed to movement anyway. These two facts coexist.

Keep the thread going. Your joints will calm down eventually.