Sports, Rights-Managed, white, black, b/w, b&w, monochrome, workout, fitness, training, sweat, teaching, pushing, situps, abs, partners, tough, muscles, muscular, spotting, competition, ability, aptitude, energy, force, forcefulness, intensity, might, mastery, moxie, aggressive, ballsy, compelling, driving, effective, energetic, energizing, forceful, forcible, go-getter, high-powered, intense, potent, powerful, strenuous, vigorous, Dynamic, arduous, demanding, effortful, energy-consuming, exhausting, hard, herculean, laborious, mean, operose, taxing, toilful, toilsome, tough going, stress, standing-center, portrait, side-view, profile, facing-right, low, endurance, energy, athlete, action, 30s, 20s, males, masculine, men, people, professional, teaching, teacher, students, accommodating, achievement, confident, serious, strength, inspirational, Model Release