Meet Your Adventure Boot Camp Instructors

Adventure Boot Camp is a division of NESTA – National Exercise & Sports Trainers Association
NESTA Fitness Certifications

John Spencer Ellis

Dr. John Spencer Ellis

John is said to be the leading fitness boot camp expert in the world. He created Adventure Boot Camp, which is now the largest and most successful outdoor fitness program globally. He is also the CEO of the National Exercise & Sports Trainers Association (NESTA), a nationally accredited (NCCA) fitness school offering personal trainer certification and many other fitness and wellness specializations.

Read John’s complete bio here


Kelli Calabrese

Kelli Calabrese MS, CSCS

Kelli is a clinical exercise physiologist who has been a fitness industry leader for over two decades. She is one of the most decorated professionals whose roles include health club ownership, being the Lead Fitness Expert for eDiets, and editing Personal Fitness Professional Magazine. Kelli has 25 fitness, nutrition, and lifestyle related certifications to her credit, along with being a spokesperson and consultant in the industry. Being part of the Adventure Boot Camp System has been one of her most valued and significant career contributions.

Kelli is on the board of advisors and a spokesperson for many fitness and consumer organizations and her articles and interviews appear in media works from Oxygen and Experience Life to Web MD, Prevention, Cooking Light, NBC, CBS and ABC.

Kelli has been a trainer to trainers since she began her first school in 1992 called Xercise Institute. She is also the author of Feminine, Firm & Fit – Building A Lean Strong Body in 12 Weeks and is the master trainer for Be Better Academy. Kelli co-created IMPACT – A group personal training system with Dr. John Spencer Ellis.

So, are you ready to join the adventure now? It’s easy to get started, click here!


You may also want to consider our other highly successful turn-key fitness business models:

Tactix Martial Arts Small Group Fitness Business System
IMPACT Group Exercise Fitness Business System

Here are other Adventure Boot Camp Products