Kids Strength and Conditioning

Age Range

Designed for ages 4-8 & 8-13

Class Benefits

Fun and engaging workouts promoting strength, coordination, and teamwork.

Focus on Values

Building confidence, resilience, and healthy habits!

Experienced Coaches

Led by Head Coach and Owner John Devitt who has a passion for youth fitness, father of three, and 25 years experience coaching kids.

Schedule

Classes held Monday & Wednesday 10:30-11:30am ages 8-13
Monday, Tuesday and Thursday 1-1:45pm ages 5-8
Monday - Thursday 3:45-4:45pm ages 8-13

Testimonies

“As a homeschool mom of three, I can’t say enough good things about Coach John and Kalos Sthenos Fitness! This program has been such a blessing for our family. My kids have grown not just stronger physically, but also more confident, disciplined, and motivated.“


“What I love most is that Coach John meets them right where they are — he challenges my kids in the best ways while still being encouraging and fun. He genuinely cares about each child’s growth, and that heart for excellence and character really shines through.“


“My husband and I seen incredible improvements in all of our kids: in their strength, endurance, and attitude, but even more importantly, in their sense of purpose and perseverance. It’s rare to find a program that builds both body and character so beautifully.“


“If you’re a homeschool family looking for something that truly uplifts your kids — mind, body, and spirit — I wholeheartedly recommend Coach John and Kalos Sthenos Fitness!“
~ Lauren Amara-Smith mother of Bella (age 8), Logan (age 7), and Sofia (age 4)


“Levi has been attending coach John’s class for just a couple of months now but we already see so much change in him. He is excited to attend class and comes back so renewed and accomplished. As a parent I see his confidence going up. He was excited to tell me he can lift more weight since the last time he tried it. I see his endurance improve as he outruns other kids in the park now and that builds his confidence as well. Coach John is really knowledgeable, and so good with the kids. You can tell they respect him and look forward to their class. I can tell the classes are preplanned and intentional. The kids are building on their skills and working together. They also love the game they play at the end. My son comes out of there sweaty and worked but very happy. As a homeschool mom it is so important to me to make sure my son can still get a good amount of exercise throughout the week to be healthy. He’s getting that and so much more from this class. We are so pleased with these classes. Thank you, coach John!“
~Maylee Munoz mother of Levi (age 5)


“My son lives Kalos Sthenos! We started about a year ago and my son always comes out of class feeling “accomplished”! (His words) He loves that the cardio is mixed in with weight lifting. He likes the encouragement and the attention to proper form. Coach John isn’t just focused on the workout, but also doing what’s good for your body; teaching the kids that food and a healthy lifestyle is equally important. My son enjoys the community as well. Cannot recommend this gym enough!!“
~Bryana Visin mother of Kurtis (age 12)


“I love going to Kalos Sthenos fitness! Coach John is very fun and engaging, and very good at explaining and demonstrating different workouts. Coach knows my level and gives me the workout intensity that is best for me. Even though some workouts are very challenging, I look forward to getting stronger and building my endurance. Now, I not only feel much stronger, but I am also more confident. I look forward to going to gym twice each week, working hard, and getting stronger.”
~ Josiah Chua (age 13)


“I’m not naturally athletic but this class has gotten me so strong and confident. It so fun and gets me moving!”
~ Dylan Rudell (age 12)