Tempe, AZ · In-person & Online

The mission

Improve the standard
together.

Sean O'Brien, OBFL coach

I coach busy adults through a real progression: body recomp, strength, muscle, diet discipline, and recovery — cardio, sleep, consistency — so the change sticks. I’m in it with you. My clients lose fat, build healthy weight, get stronger, and improve how they train, eat, and recover. That’s what I offer: a clear path to a higher standard — body and life.

  • Body recomp
  • Strength & muscle
  • Diet discipline
  • Recovery habits

Built on Discipline. Grounded in Faith.

Client results

What clients say.

Real coaching. Real accountability. Results that show up in the gym and in life.

Coaching

How you’ll train with Sean

Same standards either way: clear programming, diet guidance you’ll actually follow, and accountability. Start with the year — or pick a monthly path that fits your life.

Annual · Concierge

The Annual Standard

One decision. Twelve months. Train in-person 2–5× / week at Muscle Factory when you’re local — weekly call when you’re not. Priority access, programming, diet discipline, and recovery as one system.

  • In-person 2–5× / week at Muscle Factory when you’re local
  • Weekly coaching call year-round
  • TurnKey programming, diet guidance & form feedback
  • Priority scheduling + quarterly standard review

One annual rate for 2–5× / week flex — not a per-session meter.

$7,500/year

Pay once. Improve the standard together.

2–5× gym flex · weekly call · priority

Book a free intro to lock the year

Or go monthly

In-person

Muscle Factory Gym · Tempe

1:1 sessions — form, progressive strength, recomp work, and diet check-ins built into your training time.

  • Hands-on coaching at the gym
  • Custom programming for your body
  • Diet & lifestyle guidance
  • 3× / week Save ~$170/mo vs singles · ≈$46/session $550/mo
  • 2× / week Save ~$80/mo vs singles · ≈$50/session $400/mo
  • Single session Drop-in rate $60

Commit monthly and you’re paying less per session than drop-in — same 1:1 coaching, clearer progress.

1301 E University Dr UNIT 125, Tempe, AZ 85281

Book a free 45-min intro

About Sean

Built for the long game.

Sean O'Brien, lifestyle personal trainer

Sean O'Brien is a lifestyle coach who helps busy adults get leaner, stronger, and more consistent — with training and diet guidance that fits real life.

He's a certified trainer based in Tempe, coaching in person at Muscle Factory Gym and online through TurnKey. The focus is simple: fat loss and recomp, clear nutrition, progressive strength, and accountability that actually sticks.

Training the body. Disciplining the soul.

Book a free 45-min intro

It's time to get started.

Free 45-minute intro. We’ll pick in-person or online and map your next 8–16 weeks.

Already chatting on Instagram or Facebook? DM GYM, ONLINE, or READY.

Book a free 45-min intro