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I was 38 when I started exercising.

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That’s right, 38.

My exercise history reads like a bad report card.

Everything fitness-oriented was mandatory and completed by the skin of my teeth.

The President’s Physical Fitness Test was my Everest.

Each year in elementary school, as the day drew nearer, I would plot my illnesses.

“My fever must be high to the point of danger.

I probably have scurvy,” I’d tell my mom.

My parents never fell for it, and the day usually culminated in tears and terrible sit-ups.

I made it through my unathletic 20s like any other unathletic twentysomething.

In my 30s, it all started to catch up with me.

I contracted a new and frankly awful syndrome known to scientists as “metabolism.”

So I did what anyone would do.

I cried a bunch and cursed a universe that would not let me fit into my clothes.

But then, I joined a gym.

I never went, but I did join.

After my second child, I tried yoga, Spinning, kickboxinganything where you could justgorather than join.

But for me, yoga and Spinning didn’t work.

I didn’t like the talking and the preaching.

I just wanted to work out.

Well, I didn’t want to, but I needed to.

There was Tracy, talking about transformation and tiny muscle groups and Gwyneth.

It didn’t hurt that she looked amazing.

I made the leap.

And reader, it changed my life.

Still, my first class was a challenge.

I stood there while two of the hottest women on earth measured me and weighed me and photographed me.

It seemed like the most humiliating thing in the world.

Until I started dancing.

To say that I am bad at dancing is an understatement.

I was terrible, but no one cared, probably because they were sweating too much to notice.

The best part: The trainers don’t talk.

Last year, we started bringing a Tracy trainer to the set ofGirls.

It’s four years later and I am still committed.

When people used to tell me they enjoyed exercising, I secretly thought they were lying.

Now I know better.

I have found my home.

Top, Sweats Norma Kamali, $125; Shop.NormaKamali.com.

Tights, $140;SweatyBetty.com

Stylist, Lida Moore Musso.

Hair and Makeup, Allison Brooke for Kevyn Aucoin.

Photo Credit: Justin Steele