About Us

Coaching built around real people.

Eagle Scout owned. 15+ years of coaching experience. 300+ clients trained virtually. We built Finish Line to help active people stay independent — not to sell a quick fix.

Our Mission

Help you live a long, strong, healthy life doing what you love.

We work to make people independent — able to reengage with the activities they love and work around the aches and pains that come with an active life. We respect that the human body has real biomechanics that can't be ignored, and we build every program on that understanding. We are not a medical company, and we don't diagnose or treat pain. When you're medically cleared to exercise, we're ready to help.

Our Coaches

Meet the team.

Sebastian Gonzales

CSCS, CMES · Owner / Trainer

Coaching since 2006, from 12-year-old athletes to clients in their 90s.

Sebastian has played baseball since he was eight years old, and started lifting weights toward the end of his high school football career. He loved it immediately — but like a lot of people, he got hurt more than once chasing generic programs at local gyms. That experience is exactly what led him to this work.

He earned his first certification, the NSCA's Certified Strength and Conditioning Specialist, in 2006, then went back in 2020 for ACE's Certified Medical Exercise Specialist credential to learn how to help people navigate real conditions and stay active despite pain. His own training has swung between styles over the years, and that's taught him something he builds every program around: all lifting has a purpose — it just depends on the person.

Sebastian has coached athletes as young as 12 and clients into their 90s, but he has a particular love for training older adults. Adding strength to their lives, he's found, changes how they experience the world — it's the difference between staying near home and having the capacity to travel, keep up with friends, and keep running, hiking, or playing pickleball.

Dawne Costantino

CMES · Trainer

Soccer through college, coaching from CrossFit boxes to big-box gyms ever since.

Dawne played soccer from childhood all the way through college, and resistance training has been a constant alongside it ever since — from CrossFit boxes to big-box gyms. She's coached clients as young as 15 and as seasoned as 84, and believes every one of them can thrive with a program built specifically for them.

She's watched people in their 60s quietly give up running and hiking because a knee got grumpy past a certain distance — and watched building real leg strength get them back out further than before. What keeps her coaching is simple: hearing a client say they can do more, and feel their body less, while they're out living their life with the people they love.

Mandy Wainfan

CMES · Trainer

An ultra runner herself, bridging the gap between running coaches and strength programs.

Mandy is an ultra runner herself, and it shapes exactly how she coaches. She's seen it over and over: endurance athletes underload on strength work, get away with it for a while, and then an injury takes them out of running entirely.

Working with runners in that position has been some of her most rewarding coaching — helping them build real strength while their body heals, and keeping their running fitness up through other means in the meantime. Mandy is also a running coach, and often serves as the bridge between a client's running coach and their strength program, so the two work together instead of against each other — and running, or the trail, feels better because of it.

Garrett

CSCS, CPT · Trainer

Coaching since 2018, from Division I high school athletes to a 92-year-old client.

Garrett earned his first personal training certification while still in high school and started his first training job the day he graduated — he's been coaching since 2018, and has eight years of experience despite still being early in his career. He's worked the floor at Crunch Fitness and 24 Hour Fitness, and when COVID hit, he took the leap and started his own training business, which he's run ever since.

He holds a Bachelor of Science in Kinesiology with a focus on fitness across all populations, is a certified nutrition coach, and holds ACE's Certified Medical Exercise Specialist credential for training clients with conditions like high blood pressure. For four years he worked as a strength and conditioning coach at Valley Christian, training high school athletes — five of whom now play Division I college sports. His client list runs from age 6 to age 92.

Crystal

CPT · Trainer

Found resistance training while working to lose weight, and never looked back.

Crystal played soccer through high school and college, and found resistance training later, while working to lose weight — training that got her into the best shape of her life. Cardio helped, but she found resistance training was the piece that changed how her body actually responded.

Years of soccer left her with her own share of aches and pains, and she's found that a consistent resistance program is what keeps her feeling physically capable day to day — and that's exactly what she wants to help her clients find too. Crystal loves coaching group classes and is looking forward to bringing that same energy to online group sessions.

CSCS: Certified Strength and Conditioning Specialist (NSCA). CMES: Certified Medical Exercise Specialist (ACE). CPT: Certified Personal Trainer.

Get Started

Ready to work with one of us?

If you're medically cleared to exercise, let's talk about which coach and program fits your goals.

Book a Free Consultation