sporty young man doing sit-ups abs crunches in nature

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Photo credit: © Phovoir / Alamy / Afripics
License: Royalty Free
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Keywords: abdominal, abs, adult, arms, athlete, body, caucasian, core, crunch, crunches, determination, effort, endurance, exercise, fit, fitness, floor, leaning, lying, man, nature, overhead, pack, physical, press-ups, river, runner, side, sport, sporty, stomach, strength, vitality, water, working, workout