This is not correct. If you stretch and work on mobility, for the most part, bulk doesn't matter. Arnold type of body building and strongmen like Thor, who many consider the strongest person to ever live, are the exceptions. And still Thor is insanely agile for his mammoth size. Go to the 1:30 mark here to see.
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Here is Mat Fraser. He is 5'8" and 210lbs. He also happens to the most versatile athlete in Crossfit and 5 times fittest man on earth.
Watch how he smokes the best of the best with a gymnastics movement that is 100% finesse!
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