Ключевые слова: abdominal, abdominal muscle, abs, adult, aerobics, athlete, bicep, biceps, body building, body building exercises, body conscious, bodybuilder, bodybuilding, caucasian, dumbbell, dumbbell concentration curls, fit, flexing muscles, guy, gym, handsome, health and fitness, health club, healthy eating, healthy lifestyle, human muscle, indoors, lifestyles, light, male, man, muscular build, power, relaxation exercise, sitting, sport, sports and fitness, sports clothing, sports training, strength, strong, symmetry, the human body, waist, weight training, well being, young man,