sporty 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, athletic, body, caucasian, core, crunch, effort, endurance, exercise, fitness, hands, leaning, leisure, lying, male, man, midsection, outdoor, overhead, pack, physical, press-ups, river, runner, side, sit-ups, sport, sporty, stomach, training, vitality, water, working