Konstantin Selivanov focus as a trainer is and has always been, personalized training, injury prevention, and individualized approach

To create a positive, wellbeing-centered environment where we all gather to enjoy what we do. To learn, to grow, and to excel as individuals and as a team. To share our knowledge, to empower and support each other and our clients, changing and improving our community one person at a time.

Send me an email inquiry to get started.


Our Personal Training sessions are fully customized to your needs and with your individual goals in mind. Our results-driven Coaches and Personal Trainers will guide, coach and inspire you.

Whether your priorities are weight loss, conditioning, strength training, kickboxing/boxing competitive training, or sport-specific performance enhancement, your private classes are always evolving and always fun.


Private group training is the most popular exercise format at PowerHouse Kickboxing and Fitness. You get all the benefits of a Personal Training Session at a fraction of the price because your friends share in the cost with you.


We offer a variety of private and group personal training packages, click below to schedule!


For more details on classes, requirements, descriptions and necessary equipment, please go to the schedule and click on a particular class you are interested in. Always bring water, we also have water for sale.

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About Us


We get it! The only reason PowerHouse Kickboxing (PHK) is entering it’s second decade of business, is thanks to the patronage of our clients, and hard work of our team; a team of professionals, passionate about their craft.

We listen! We are so grateful for any and all feedback we can get from our clients and our team members. Please talk to us, compliments, ideas, suggestions, concerns – all are welcomed.

5 of 5 stars

  • Great workout! They really push you to keep going hard! The location is great too! And the instructors are nice, friendly, and know what they're doing!

    Jacob S
  • I love the group classes, I lost 31 pounds going 3 times every week. I recommend to anyone that wants to be stress free.

  • Great coaches! , You really work out in those 50 mins of your time. Check it out

  • Kickboxing is the best workout! You get really fit while learning something and having lots of fun. Coach K is the best. He's not only a great coach and great motivator, he's just a wonderful guy too. I should know, I've been working out with him for over two years! The brand new location is beautifully equipped, with everything you need for working out and kickboxing. I recommend it wholeheartedly! Don't hesitate, give it a try, you'll be really glad you did!

  • There are no words to describe just how much both coach K and the gym has changed my life for the better. K has been privately training me for almost a year, and it is an understatement when I say that he is incredibly passionate, patient, and so much fun to work with. As someone who has struggled with mental illnesses, both K and kickboxing were, and still are vital components in what has helped me to continue working towards becoming a better and (both physically and mentally) healthier person. Highly recommend!

  • My daughter and my niece walked in to use the gym and they loved it. Konstantin was coaching them and they had an intensive kickboxing workout. Excellent place.

  • My trainer and I get along so well and it puts a smile on my face when I see younger children's classes come in with such enthusiasm! I'm so glad it's near my apartment and they're so flexible with scheduling private sessions. I actually get motivated to go to the gym, now ?

  • I trained for an hour with owner Constantin. I have been training in boxing for the past three years so I'm rusty in kickboxing. His style of fighting, which is his invention merging boxing, Kung Fu and Tae Kwon Do, is extremely effective. We did "touch" sparring so that I could see what Bokatai was like but then he helped me on techniques for boxing an opponent who is just throwing a non-stop barrage of jabs and crosses. I thought his style is extremely effective and I want to learn and practice more the boxing applications of Bokatai.

    MIA W Auburndale, MA