Trener kontrolowanie chłopca, że ten rozciągając ćwiczeń w centrum fitness - Zdjęcie stockowe & obraz

Squats with a bar, strength training and exercise for children

Boy doing push up exercise in gym, front view. Youngster on training in sport club, healthcare and healthy lifestyle, schoolboy on workout, sportive youth

Children training with exercise gliders, improving balance and coordination skills

Squats with a bar, strength training and exercise for children