Meet Our Personal Trainers

Kolon DialloPhoto © Tony Powell 

Kolon Diallo believes that reaching your goals can often be boiled down to this simple equation: Consistency & Motivation = Change & Success.“There is no better place than here, no better time than now,” Kolon adds. “You will do difficult things you thought you couldn’t do. You will run faster and longer than you thought you could run. You will lift more weight than you thought you could lift. Doing things you thought you couldn’t do will make you feel good.”

Originally from Hyattsville, Md., Kolon holds a bachelor’s in science in Rehabilitation Science and is a World Instructor Training School certified personal trainer. Kolon works with clients of all ages and fitness levels, and specializes in weight loss and nutrition education training, speed and agility training, performance training, post rehab training, and sports performance training. Kolan stays in shape by running, playing basketball, swimming, and his his spare time he enjoys watching sports and comedy, plus — just relaxing once in awhile!

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Steve Basdavanos  

Steve holds degrees from the University of Pennsylvania and University of Maryland.  He is certified as a personal trainer by the National Strength and Conditioning Association (NSCA), with over 15 years of experience.  His previous personal experiences include Olympic lifting and power lifting.  He won a silver medal in the masters division of the Maryland State Powerlifting Championship (held by the Maryland State Powerlifting Association, the state chapter of the USAPL) in November 2014 and holds four Maryland State records. Today, Steve trains clients for overall fitness, including core strengthening and stability progressions with basic resistance training exercises.  He has worked with clients with a wide variety of health issues including rotator cuff problems, knee and hip replacement. In 2010, 2012 and 2015 Steve received honors from Bethesda Magazine for being one of the area’s top trainers.


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Devin Knox  

Devin is a graduate of the University of Maryland with a BS in Kinesiology.  He has been a certified personal trainer through ACE since 2008, as well as a NSCA-certified Strength and Conditioning Specialist since 2014. Basic Olympic Lift certified, Devin has been competing in powerlifting since 2013 and is currently the world heavyweight strict curl champion.  Although Devin’s training is geared towards powerlifting, he prides himself in being an extremely versatile trainer and will design workouts for your specific goals.  Devin believes everyone should strive to improve their own movement patterns in order to build strength through a full range of motion.

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Marian Lally  

Marian Lally, the Programming and Pilates Director at Rock Creek Sports Club, has more than 25 years of experience in the industry. She holds a comprehensive Pilates certification (Reformer/Tower/Chair/Barrel/Mat) with Balanced Body, group exercise through the American Council of Exercise (ACE), and personal training through ACE.  She is also a Continuing Education provider for Balanced Athlete. A former dancer, Marian traded in her dance shoes for a pair of sneakers in 1992 and became a group exercise instructor, and eventually a certified personal trainer in 2000. The latest part of her fitness journey includes becoming certified to teach Pilates Mat and Balanced Athlete. Pilates and BA are natural extensions of Marian’s philosophy of “functional fitness,” and both are invaluable for injury recovery, sports performance, good posture and optimal health. “Teaching clients how they can be active for a lifetime, even through injuries, aches and pains, illness, or life’s set backs is a rewarding part of my client relationship.”

Marian also has a confession. She is a former sugar and bread junkie! “Making changes to a diet that reduces inflammation and cures disease has increased my quality of life. If I can refrain from processed foods and sugar, and get about 15% of my diet from animal products, anybody can.”

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Angela Sims  

Angela is certified as a personal trainer and group exercise instructor through AFAA, and is a Balanced Body Instructor in Pilates Mat 1 and Mat 2.  She has been in the fitness industry for almost 20 years. Angela has successfully trained clients for fitness competitions, class reunions, weddings as well as everyday life.  She specializes in incorporating Interval Training, Boxing, Pilates and/or Yoga into her training sessions to enhance client results, designing workouts that are efficient and effective. Her fitness DVD “Tighten Up” was released in 2005 and encompasses her training techniques.  Angela holds a BS in Communications Studies from Northwestern University in Evanston, Il.  She received her JD from Washington University School of Law in her hometown, St. Louis, MO.

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Sharon Sellers  

Sharon is the Fitness and Operations Manager at Rock Creek Sports Club.  She is certified as a personal trainer by National Strength Conditioning Association (NSCA) and has over 20 years of fitness experience. Previous athletic experience includes track, softball and competitive bodybuilding. Sharon’s philosophy is live life in the balance. She has a BS in Computer Science from Florida State University and is mom to 4 children.

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Zach Tolchin  

Zach is certified as a personal trainer through the National Personal Training Institute (NPTI) where he studied strength training and kinesiology.  He also holds the Basic Olympic Lifting Certification (BOLC).  Zach attended Yeshiva University in New York and The Genesis Institute in Jerusalem, Israel and has spent time traveling in Europe.

Zach is active in the Powerlifting world, competing himself as well as coaching Maryland state record holding powerlifters. His philosophy on exercise is “One step at a time leads to big results.”

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Jean Simons  

Jean is certified as a personal trainer by the American Council on Exercise (ACE) and a Corrective Exercise Specialist with National Association of Sports Medicine (NASM).  She has also earned the Cancer Exercise Specialist certification, which is provided through ACE by the Cancer Exercise Training Institute.  Jean has had a lifelong interest in fitness and nutrition, and recently began competing in triathlons and 5ks.  Jean works with clients to translate short and long-term goals into fun, safe and personalized training sessions. She provides clear exercise schedules, email reminders and guidance on nutrition.  Jean trains both exercise novices and experienced athletes, and helps clients suffering from joint, weight and flexibility issues.  When she’s not at Rock Creek Sports Club, she volunteers at N Street Village, where she leads a fitness class for homeless women.  Jean has A BA from the University of Chicago, a JD from NYU School of Law, and is a mom to three daughters. She also enjoys hiking and canoeing and listening to live music with her husband.

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Tina WarnickTina.Warnick  

Tina is a certified personal trainer from the World Instructor Training School and a certified running coach from the Road Runners Club of America. She also holds a BA in Anthropology from Haverford College and a MS in Education from University of Pennsylvania. Whether you’re a beginner and looking to discover the joys of physical fitness, or training for triathlon, Tina is your woman.  She believes that “once you incorporate fitness as part of your lifestyle, you’ll wonder how you lived any other way!”  Originally from Tia Juana, Venezuela, Tina has lived all over, and during her spare time she enjoys swimming, cycling, running (triathlons!), reading, and traveling with family.

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Isiejah Allen Isiejah

Isiejah is certified by the National Academy of Sports Medicine (NASM) as a Performance Enhancement Specialist. A native of Silver Spring, MD, Isiejah attended Gonzaga College High School in NW DC, then Fordham University in NY, where he obtained a B.A. in Business Administration and Communications. Isiejah is also a professional athlete, having competed in football and rugby.

Using many different modalities of training, Isiejah works with clients of all ages and fitness levels. Isiejah helps his clients with weight loss, strength, sport-specific training, balance, and coordination. Isiejah also understands that a safe workout environment is conducive to achieving maximum results.

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Akosua Asoto Akosua Asoto

Akosua Akoto is a dancer, dance instructor, scholar, and mentor. Her unique approach to fitness is grounded in the creative application of rhythm and choreography to basic principles in biomechanics and physiology. She has experience in athletic, physical therapy and performing arts settings. Among her credentials, she holds:

  • BS Sports Medicine- Howard University
  • MS Human Performance, Rehabilitation and Injury Prevention – California University of Pennsylvania
  • Personal trainer certification- American Council of Exercise (ACE)
  • Performance Enhancement Specialist certification- National Academy of Sports Medicine (NASM)
  • Speed Specialist Certification -National Academy of Speed and Explosion (NASE)
  • Fitness Nutrition Specialist – American Council on Exercise

Akosua’s story: “The plan was to earn a degree in dance.  After seeing and experiencing flaws in the physical conditioning, rehabilitation and general well-being of my fellow performers and athletes, I moved into the world of exercise science.  My style has since evolved to fun, exciting, workouts with emphasis on form, alignment, skill acquisition, functional movement, injury prevention and intensities that progress with your fitness levels.  The goal is to create bigger goals! But we ‘can’t build houses on sand’.”  Akosua’s fitness philosophy is that there are no general bodies. So there are no general workouts. Make it personal, make it enjoyable, make it sustainable.

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Julie Vogel Martie Bollo

Julie is certified as a personal trainer through the National Association of Sports Medicine (NASM) as well as a certified TRX suspension training instructor. Julie’s original career was a construction project manager with a BS in construction management/structural engineering from the University of Washington. While she has always been active, Julie grew to love lifting in college and eventually moved from the construction business to the fitness industry. Just like a building needs a strong base, Julie focuses on improving her clients’ foundation and movement patterns during strength training to benefit them in their everyday activities.

Healthy living and eating is a priority at home. However, her husband and three children will tell you that Julie’s favorite saying is “everything in moderation, including moderation.” For her own workouts, Julie enjoys lifting, bodyweight workouts and cycling.

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Gorica Markovic Gorica Marcovic

Gorica (pronounced Go-rit-za) was born and raised in Gorasde, Bosnia and Herzagovina. She earned a AA in Physical Education from the University of Belgrade, Serbia and an AA in Business Administration from Strayer University, Washington, DC. Gorica has lived in the DC area since 1997 and feels this is home. Her personal training certification is with NASM and her specialties include motivational coaching, increasing stabilization, flexibility and strength, Powerlifting, Yoga and partner training.

Gorica’s philosophy on exercise is “Mental focus is the key. It opens the window to limitless health, strength and energy. When you experience the power that comes with it–you become integrated and the movements are natural.”

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Caity Adams Stephen Burnett

Caity hails from Easton, Maryland. She’s a Certified Personal Trainer, Phase II Master Trainer, and Life Wellness Coach through AAAI/ISMA and has worked as a personal trainer since she was 16 years old. Caity is currently working on a Bachelors of Science in Kinesiology at the University of Maryland.

Caity ran Division I Cross Country and Track and Field at Towson University.  Additionally, she ran 410 miles across the state of Maryland for a fundraiser she had created for amputees who could not afford prosthetics.  Caity also has experience powerlifting and placed top 3 at a National USA Powerlifting meet her first year competing.

While Caity does love working with athletes, she also has experience and enjoys personal training those who are trying to lose weight and change to a more healthy lifestyle.

In her spare time you can find Caity enjoying a good run, weight lifting, kayaking and reading.

Caity’s exercise philosophy: “Believe in yourself. If you can change your mind, you can change your life.”

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Avi Weitzman Avi Weitzman

Avi is a personal trainer certified by the National Academy of Sports Medicine (NASM). Avi developed an interest in weightlifting during his teenage years while volunteering as an EMT for the Rockville Volunteer Fire Department. Over the years he has trained under a number of competitive bodybuilders, gaining extensive knowledge in advanced bodybuilding techniques.

Avi also has a background in Tae Kwon Do, competing in multiple tournaments and earning a Black Belt from the World Martial Arts Association.

Whether training for weight loss, core stability, or strength and physique enhancement, Avi uses his martial arts experience to help clients focus on the connection between body and mind. Avi is a graduate of the University of Scranton.

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Chris Kunde Chris Kunde

A native of Sterling, Illinois, Chris currently holds an ACE-CPT certification and an ACE Sports Conditioning Specialization. Chris served in the United States Army with a tour to Afghanistan, where he earned the Army Fitness Badge, among other decorations, which emphasizes the importance of fitness to Chris.

Chris has always been active in sports and fitness, including wrestling, baseball, and captaining his high school soccer team. He also was a high school soccer coach in Illinois, specializing in goalkeeping. In addition to powerlifting, Chris actively plays recreational soccer and ice hockey for the USA Warriors Ice Hockey team. His training specialties are sports conditioning and functional fitness.

Chris’s fitness philosophy is based on an old phrase, “Rome wasn’t built in a day.” He ensures his clients take their time in improving their fitness in a safe manner, noting that injury prevention is a top priority and that proper form and progression are the keys to being injury free.

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Samantha Samantha

Originally from Grand Rapids, MI, Samantha became interested in fitness at an early age. She was inspired by her mother, who was and still is very active and health conscious. Samantha became certified as a personal trainer in 2012, and went on to get her Nutrition Specialty Certification in 2015. She most recently received her Level 1 Balanced Athlete Certification in 2017. Samantha played soccer growing up and now enjoys running, weight lifting and yoga-inspired workouts. While she loves working with all types of clients, Samantha specializes in the active aging population and incorporates a training style geared toward healthy living and injury prevention. Her number one goal as a trainer is to make fitness safe, effective and fun!

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Emily Emily

Emily is a certified personal trainer through the American Council on Exercise (ACE). She has been participating, competing, or teaching various forms of physical activity for two decades. Though her background is in dance, she is currently a successful competitive powerlifter, most recently earning her spot on the winning Team USA at the 2017 world championships. She also enjoys training for more endurance related activities such as backpacking and enjoys hiking with her dogs. Her training philosophy is that visualizing success and remaining consistent is the key to reaching any goal.

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