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Working out with Grandma
(media.piefed.world)
People tweeting stuff. We allow tweets from anyone.
RULES:
Even the kinds of cardio you can do vary considerably. I bike 50 miles a day (in summer, at least) and a few years ago I signed up for a spin class (stationary bikes) at my gym thinking I would have an easy time of it. Nope, that shit kicked my ass. I don't think I lasted even 10 minutes.