To avoid being discharged, he would have to run three miles in less than 33 minutes, do 100 sit-ups in two minutes and manage three pull-ups.
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By his mid-20s he had mastered doing pull-ups with one arm, or with 140lb of weights.
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After performing nine sets of pull-ups, he put it on for three minutes.
In his next set he was able to manage about the same number of pull-ups as when he had started.
The company has decided to concentrate on non-fastening nappies such as pull-ups and will continue to make Huggies-branded wipes and Little Swimmers.
Normally, the number of pull-ups that Dr Cao (or, indeed, anybody else) could manage this way would drop from set to set.
Every few days, Vinh Cao would do sets of pull-ups, sometimes using the glove for three minutes between sets, to test its effects.
Welty said her son never met a tree he didn't want to climb and was so strong he could do pull-ups with two fingers.
It won't be long before this muscle mania reaches Broadway and we get a Willy Loman who yells at Biff while ripping through sets of overhand pull-ups.
Shoot for 3 sets of 6-8 big movements (like squat, lunge, deadlift, pushups, pull-ups, presses, rows, and all their variations) with about 45 seconds rest between sets.
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But for many men, the most difficult part of P90X isn't its heavy emphasis on pull-ups and push-ups, but rather its relentless call for stretching and warming up.
And by using the glove between each set he was, in a subsequent experiment, able to raise his performance in a full session from 180 pull-ups to 600.
It was a catwalk of energetic, giggly models in active wear chatting on cellphones as they waved to attendees, then an exercise routine led by the designer that included running in place, yoga and pull-ups.
While being sprayed with fire hoses and surrounded by smoke, explosions, and gunfire, instructors sent us in all different directions: bear crawling to the surf to get wet and sandy, to the grinder to perform hundreds and hundreds of flutter kicks, pull-ups, and pushups.
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Anyone who watched the frigid reception given Jeb Bush in response to his attempt to present serious issues for review and consideration would have every reason to throw away the speech prepared for the grown-ups and pull out the collection of laugh lines they had tucked into the briefcase on the way to the convention.
In order to pull off such a feat, United Parcel Service (UPS) relies on Worldport in Louisville, Ky.
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