Ключевые слова: adult, angry, anxious, background, ball, business, clenched, closeup, concept, conceptual, crunch, energy, exercise, female, fist, frustrated, frustration, hand, hold, isolated, lifestyle, metaphor, nervous, object, person, power, pressure, squeeze, strength, stress, stress ball, stress management, stressed, symbol, tense, white, woman, worry, yellow, young,