• Owner- State of Fitness
  • Bachelor of Science in Kinesiology
  • Certified Strength and Conditioning Specialist
  • National Academy of Sports Medicine- Certified Personal Trainer
  • Crossfit Level 1 Trainer
What do you love about SOF/What does SOF mean to you?

I love the team atmosphere that encourages everyone from all demographics to lead a healthier more active lifestyle in a fun and effective manner.




 My wife Katie, sons Brennan and Beckett, and Golden doodle Bailey

Favorite Exercise

 Barbell Deadlifts

Least Favorite Exercise

 Bicep Curls

Who do you look up to and why?

Anyone in our industry that is looking to make an impact on people’s health, fitness, and overall lifestyle.

Favorite Healthy Snack

 Filet, baked potato, and broccoli

Guilty Indulgence

 Pizza, no doubt!

What do you do when you are not whipping people into shape?

Playing with my son Brennan, bike riding with the family, reading, writing, and watching TV.

Favorite Quote

Without self-discipline, success is impossible, period. – Lou Holtz


Justin Grinnell is the owner and head trainer at State of Fitness in East Lansing, Michigan. Justin received his Bachelors of Science in Kinesiology from Michigan State University specializing in Exercise Science, Fitness Leadership, Athletic Administration, and Health Promotion in 2004. He is a Certified Personal Trainer through The National Academy of Sports Medicine (NASM), and the International Sports Sciences Association (ISSA). He also holds a certification from The National Strength and Conditioning Association as a Certified Strength and Conditioning Specialist (CSCS), Level II Kettlebell Coach by Kettlebell Athletics, Level 1 CrossFit Trainer, and Precision Nutrition Level I Coaching certification.

His experience as a trainer is extensive as he started training over twenty years ago when he helped his brother sign with the New York Yankees organization in 2002. Since then he has accumulated over 30,000 hours of training and coaching experience.

In 2004 Justin started to work as an intern for Michigan State University Strength and conditioning department, where he gained exceptional knowledge and experience as he worked with Division I college athletes everyday. Justin specializes in working with all athletes ranging from the youth to the professional athlete. Injury prevention is his number one priority when it comes to strength and conditioning, Justin has worked with hundreds of high school athletes and teams, and has helped over 100 athletes advance to the college level.

In 2010, Justin helped create State of Fitness University, an internship program with over 400 students attending the school. Justin has made it his purpose to help anyone and everyone who wants to learn the field of fitness and personal training and charges nothing for his time but the commitment and hard work in the program.

Justin Was born in Lansing, Michigan in 1981, where he grew up and attended school. Justin was a 3 sport athlete in high school where he played basketball, baseball, and football at Waverly High School in Lansing Michigan, where he was a part of the 2000 Class A State Championship basketball team which ended the season #20 in the country. He then continued his athletics while competing in powerlifting, and then transitioning into bodybuilding. He competed in 7 different shows from 2003 to 2006, where he placed in the top 5 in all shows but 2. Justin also competes in 7 Crossfit competitions and Olympic lifting. He now focuses on keeping his body healthy and extending his longevity through smart training and purposeful eating.

Justin lives with his wife, Katie, and sons Brennan and Beckett.


State of Fitness and Justin Grinnell did an amazing job preparing me for college athletics. The workouts always pushed me to get better and to work harder than I thought I could. Not only are the facilities great too, but the people are amazing! Everybody on staff at State of Fitness is so friendly and helpful. Whenever I had a specific question about a workout, or why the trainers would have us doing a specific lift, they would answer my questions with very helpful explanations and advise. After a long day at school, coming in to State of Fitness was the best part of my day. – Julie Grisdela

We met Justin Grinnell when we had just entered our fifties. At that time, we were not happy with the state of our physical condition. Working out on our own was not getting the job done. Individually we were unable to hold ourselves accountable to workout and become stronger.

That all changed when we met Justin Grinnell and joined State of Fitness. Justin evaluated our current fitness levels and helped us come up with a plan to achieve the needed results. Justin doesn’t just train us. He encourages and coaches us to reach a more desired level of fitness. Justin educates us on current trends in nutrition and health. He counsels us on what we need to do to maximize our strength and stamina and how we should go about reaching desired weight goals.

State of Fitness is not just a gym. It is a lifestyle. The trainers and staff provide a positive and encouraging atmosphere which motivates us to keep coming back. We owe our fitness progression, improved health and wellness to Justin Grinnell and State of Fitness. – Bruce and Teresa Sutherland

When I started training with Justin at State of Fitness I had just completed three years of nearly continuous business travel and was in the worst physical shape of my life at age 42. I appreciated how Justin started my training sessions with basic exercises to slowly yet steadily build my flexibility and strength. As I continued to build my strength and fitness, Justin used his creativity and expertise to keep our training sessions productive, challenging and fun! Currently, after a couple of years of training, Justin has me as strong and flexible as I’ve ever been and performing olympic weight training exercises that I never imagined myself doing. More important to me is how training with Justin has improved how I feel outside of the gym. My body alignment and core strength is so improved that I notice it even in simple things like putting on my socks or playing catch with my son. Lastly, Justin provides health expertise well beyond physical training. While I don’t take advantage of it to the extent that I should, his knowledge of nutrition and overall health goes well beyond the norm. Thank you Justin, your impact on my health has been fantastic. – Rick Lasch


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