Cardio - Yes, you can run all day if you like as long as your body can handle it in terms of energy. Be careful though, because the more you run, the more you are likely to injure yourself. I used to get shin splints from running too much (with bad form). Also, a common ailment of a runner that runs too much is losing toe nails (no joke).
Weights - I DO NOT RECOMMEND you do this twice a day. Your body probably won't be able to handle it. And if it can, it means you weren't doing it effectively the first time.
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"Your name's Geek? Do you know the origin of the term? A geek is someone who bites the heads off chickens at a circus. I would never let you suck my dick with a name like Geek"
--Kevin Smith
This part just makes my posts easier to find
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