About us
The people behind every program
EIGHT is a premium training and wellness studio in Marousi, built by people who lived sport at a high level — and know what real coaching means.
EIGHT was founded in 2018 by Valantis Peltekis and Katerina Kouvarnta, Physical Education graduates and former high-level athletes. Our goal is to meet the needs of anyone who wants to train safely and with a real plan, to reach their goals.
EIGHT offers personalized training programs — one-on-one or in small groups. In our space you'll be welcomed with care, genuine interest and real guidance toward your goals, whatever they are: athletic performance, rehabilitation, or simply a healthier everyday life.
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The team
Meet the team
Valantis Peltekis
Founder · Personal & Performance Training
A Physical Education graduate specializing in volleyball. He was a professional A1-division volleyball player (AEK, Rethymno), a member of the national junior/youth team and the 2004 pre-Olympic squad, with distinctions in Balkan and national championships. Since 2008 he has worked as a trainer in major gyms and served as fitness coach for AEK volleyball (2018-19). In 2018 he founded EIGHT, where he specializes in injury-prevention training and athletic performance.
Katerina Kouvarnta, MSc
Founder · Pilates Instructor
A Physical Education graduate with a Master's in exercise psychology. A competitive swimmer with national-level distinctions, she taught swimming to children and adults and was an instructor at the Ikaron school. Since 2004 she has worked in the fitness industry, with years of experience in strength training and Pilates. She holds a BASI Pilates certification — one of the most respected Pilates schools worldwide — and teaches Pilates to clients seeking fitness, injury rehabilitation, athletic performance, and prenatal care. In 2018 she co-founded EIGHT with Valantis Peltekis.
Sonia Pikrou
Pilates Instructor
A certified Pilates instructor trained at a private school with years of personal experience as a Pilates practitioner. Her journey began after a lower-back injury, where Pilates became key to her own recovery. She has completed specialized seminars in prenatal and Clinical Pilates, adapting each session safely to the individual.
Markella Bouzineki
Pilates Instructor
A Physical Education graduate specializing in tennis, with further studies at the Maro Marmarinou School of Dance. Certified in both mat and equipment Pilates, with a specialization in prenatal exercise and seminars in therapeutic and rehabilitation training.
Savvas Zafeiropoulos
Personal Trainer
A fitness professional with roots in basketball, Tae Kwon Do and Greco-Roman wrestling. A graduate of a private coaching school specializing in resistance training, with extensive experience as a Fitness Instructor and Personal Trainer. Active in Cross Training since 2014, with competition experience.
Apostolis Sakaris
Strength & Conditioning Coach
A Physical Education graduate specializing in basketball, with a Master's in maximizing athletic performance. A certified top-division basketball coach with experience at professional (Kolossos Rodou, Iraklis) and development-level clubs. As a Strength & Conditioning Coach, he specializes in improving fitness, strength and performance for athletes of every level, as well as injury rehabilitation.
Ready to start?
Book your first session and meet the team in person.