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Colorado's Frank Sagona shattered the Guinness World Record for the most chin-ups in one hour with 1,010 reps, overcoming a back muscle strain and discomfort.

United statesFrank sagonaStephen hylandOne hourGuinness world recordChin upWorld record010 repsPhysical prowessUnderhand gripMuscle strainBack injuryBreath difficultyBodyweight exercisesBackyard workout