DJ Khaled is so on his grind ... the man can't even slow down to change his clothes.
Khaled was bolting from a music video shoot in Queens with Jay Z when he momentarily went topless ... as his entourage helped him with a wardrobe change.
Khaled's been working on his fitness -- earlier this year he did a 22 day vegan diet challenge, and also went gluten-free. Tuesday morning he was logging treadmill time ... mogul-style, of course.
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