Ключевые слова: 40s, abdominal, abdominal muscle, abs, adult, athlete, back, biceps, body building, body building exercises, bodybuilder, bodybuilding, caucasian, chest, fit, flexing muscles, guy, gym, handsome, health and fitness, healthy eating, healthy man, human muscle, indoors, lifestyles, machine, male, mature, middle age, muscular build, posing, power, sport, sports training, strength, strong, symmetry, triceps, weight training, young,