Next Gen team flexing in front of TEAM WORK mural

Our Story

ABOUT NEXT GEN

BUILT FOR PEOPLE WHO
REFUSE TO SLOW DOWN

Next Gen Personal Training was founded with one clear mission: to help adults over 50 reclaim their strength, mobility, and vitality.

We saw too many people being told to “take it easy” or “act their age.” We believe the opposite. Your 40s, 50s, 60s, and beyond can be the strongest, most confident years of your life — if you train the right way.

What started as a single training space has grown into two thriving locations in Randolph and Harding, NJ — each filled with members who prove every day that age is just a number.

Our Mission

“We believe everyone over 50 deserves to feel strong, mobile, and confident in their body.”

Our Values

The principles that guide everything we do.

EXPERT COACHING

Every session is led by certified trainers who specialize in working with adults over 50. We stay current with the latest exercise science to deliver safe, effective programming.

COMMUNITY FIRST

We've built more than a gym — we've built a family. Our members support, motivate, and celebrate each other every single day.

RESULTS DRIVEN

We track progress, adjust programs, and hold you accountable. No wasted sessions. Every rep has a purpose.

SAFETY ALWAYS

Proper form, smart progression, and injury prevention are non-negotiable. We train hard, but we train smart.

Our Approach

How we get results that last.

PERSONALIZED

No two bodies are the same. Every program is custom-built for your goals, your limitations, and your lifestyle.

SCIENCE-BACKED

Our methods are rooted in exercise science and sports medicine. Evidence-based programming that actually works.

COMMUNITY-DRIVEN

Training alongside others who share your goals creates accountability, motivation, and lasting friendships.

Meet The Team

The coaches who make it happen.

Kelly Krauss

Director of Personal Training

Randolph

With over a decade at Next Gen and as part owner of the Randolph location, Kelly holds a Bachelor's in Exercise Science, NASM certification, Precision Nutrition Level 1, and a Menopause Coaching certification. She is dedicated to creating an inviting environment that feels like home and empowering individuals to realize their full potential.

Kasey Celniker

Director of Personal Training

Harding

Kasey grew up an athlete with a passion for movement and healthy living. A Psychology and Sociology graduate from the University of Colorado Boulder, she holds NASM certifications as a Personal Trainer, Corrective Exercise Specialist, and Nutrition Coach. She specializes in working with adults 40 and above, helping them perform at their best.

Bryan Christopher

Coach

Randolph & Harding

A University of Rhode Island graduate and NSCA-certified Strength & Conditioning Specialist with AED/CPR certification, Bryan is a former two-sport varsity athlete who is passionate about sharing, teaching, and coaching people to improve their sporting skills, health, fitness, and life.

Danielle Collentine

Coach

Randolph

With a Health Sciences degree from Arizona State University, Danielle brings two years of dedicated coaching to Next Gen. She holds NASM Personal Trainer and Weight Loss Specialist certifications, focusing on helping clients feel safe, supported, and confident both inside and outside of the gym.

Deb Van Dusen

Coach

Randolph

An NASM-certified trainer and lead programmer since 2021, Deb also holds Precision Nutrition certification, Menopause Coaching Specialist credential, and Level 1 MELT Method instruction. Her philosophy emphasizes functional strength — helping people move better, feel stronger, and build the kind of strength that supports real life.