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Zac Flecksteiner

@zcfleck

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- Head Trainer
@mbscthrive @cityfitnessofficial
- Nutrition Coach
- Retired mediocre D3 athlete

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CF | Thrive Head Coach @zcfleck on KB Swings at a recent @cityfitnessphilly event #cfthrive #thrivefit taken in City Fitness Philly by @zcfleck

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a year ago

a little bit of this and a little bit of that by @zcfleck

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2 months ago

First half of summer recap 🤘🏼🙂‍↕️ taken in Philadelphia, Pennsylvania by @zcfleck

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3 months ago

GHO THRIVE COMBINE RECAP:

Today marked @cityfitnessofficial Graduate Hospital’s second annual Thrive Combine!

The ZFLECK crew came out strong today and crushed it!

Words cannot express how grateful I am for the community I’ve been able to create with my clients over my three years as a Thrive Coach. These are some of the brightest, funniest, and hard working people I’ve ever been around. I can’t thank them enough for the work they all continue to put in week in and week out. You guys all rock, never EVER change.

The culture in our Thrive department as a whole is something else. The relationships I’ve built with my coworkers over my time at City Fitness are something very special to me. We have a special group, and events like this showcase that.

To cap it all off, I hit an EASY 2:06 on my 1-mile assault bike sprint 👀 taken in City Fitness Graduate Hospital by @zcfleck

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3 months ago

Technically we finished in 1:21 if you don’t count our 7 minute penalty!

Don’t recommend competing at 1:30pm in 93 degree weather either! taken in Pier 76 by @zcfleck

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4 months ago

Busy couple of weekends! by @zcfleck

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4 months ago

BROAD STREET RUN ROUND 3: I felt 10-FEET TALL (iykyk) this entire race

Nice little 9-min PR this year with a negative drop the whole race, along with a ~few~ Fireball shots along the way 🥴 taken in Philadelphia, Pennsylvania by @zcfleck

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5 months ago

Nothing but some good clean fun lately taken in Philadelphia, Pennsylvania by @zcfleck

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5 months ago

I completed my first half marathon today. With this achievement came some heavy emotions, especially as I was going through my prep leading up to the race.

For those that don’t know, my uncle passed away in June of last year from pancreatic cancer. After his diagnosis in the fall of 2024, he was immediately deemed terminal.

After his diagnosis, he and I texted almost every day leading to his passing. One of the very last conversations I had with him included him encouraging me to start competing in more fitness-based competitions, and that he would love to see me not only compete, but do well too. With six different competitions on my calendar this year, I think he’d be happy to know I’m fulfilling that wish. 😂

Growing up, he was one of my heroes (along with my mom and dad obviously). He was also one of the first people in my life to introduce me to fitness and working out. I was always the super skinny kid and severely underweight growing up, and he was one of the first people to push me in the right direction and expose me to this world.

I give him all the credit for me going down the path I am as an individual, and a professional as well. To be completely honest, I wouldn’t be working in the fitness industry if it weren’t for his influence.

Today was for you, Uncle Sean. I know you weren’t physically here, but I know you were running with me the whole way. taken in Philadelphia, Pennsylvania by @zcfleck

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6 months ago

(3/3/26): 455 FOR 5 HAS FALLEN! At 189lbs too 👀

If I gave this an honest RPE, it was for sure a 9/10. I don’t think I’ll ever be efficient at pulling the slack out of the bar LOL taken in City Fitness Graduate Hospital by @zcfleck

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7 months ago

January was definitely the start of the year taken in Philadelphia, Pennsylvania by @zcfleck

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8 months ago

We are fitter together.

#cityfitnessphilly by @zcfleck

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8 months ago