Professional Personal Training.


The Studio

“…..There were many moments when I wanted to give up on the workouts and the diet, but there was one person who was always there and supported me without fail and that person was Mark Gontar. Thanks to Mark I am strong, in shape and healthy. Mark’s dedication in seeing me succeed was really inspiring and has changed my life.”


Jeff P.

"One of the things I like about training with Mark is he is real. Very down to earth. He has the best of the best in fitness equipment and I have worked out in many gyms. Mark did not “cut corners” when designing his gym. It is a fast paced workout. He always knows where we are going and what we are doing next. He pushes me to “my” limit. I would highly recommend him.”​


Tom J.

What Clients Say About Us

“Mark is incredible. I have worked out with him now for 3 years. I love the gym. Mark motivates me and pushes me to do more than I thought I ever could do on my own. I was unsure of the small group atmosphere at first but Mark is the best multi-tasking I have ever seen. We are all working on our own workout program which he tailors for us specifically. No other trainer I have ever had cold come close to his expertise and overall knowledge.


Cynthia H.

About Mark!

Mark Gontar is a South Bay Manhattan Beach professional personal trainer who has been training for over twenty years and he continues to love it!  Loves his job of helping people improve their health and fitness! Clients are an equal mix of male and female from teens to seniors all wanting to change or enhance their life through fitness training, weight loss exercise programs or bodybuilding.

At Body by Design YOU WILL get what you paid for! I personally guarantee you the best workout of your life and my full commitment to your fitness goals! 

With a personalized workout program for your specific needs! 

915 Sepulveda Blvd.

Manhattan Beach, CA 90266

(310) 614-0705

Call for your FREE Consultation

(310) 614-0705

Congratulations on deciding to take the next step in designing the new you!

Body by Design was founded in 1993 with the focus on helping clients meet their fitness goals with strength training and nutritional assistance.

Body by Design is located in South Bay Manhattan Beach owned & operated by Mark Gontar, Professional Personal Trainer.  Servicing the Los Angeles area and South Bay cities of Manhattan Beach, Hermosa Beach, Redondo Beach, Palos Verdes, and Rolling Hills.