Gym question

[Tyrfing]

you are asking for advice on a gaming forum...not to say people here don't have good advice. I am just saying you can google this and find forums that are specific to exercise/weight training that will have a VAST array of information.

An example is: http://forum.bodybuilding.com/

This.

And I would go a step further to say that most people do not give good advises.

EDIT: When working out at home (pushups, situps) I feel like throwing up like 15 mins in..is it because of lack of fresh air inside house or something? Cuz i can play ball and other sports for hours without feeling nausea / the feel to throw up

I'm not too sure what is taking you over 15 minutes to do, if pushups and situps are all you are doing.

No, it's most likely not due to a lack of fresh air. Probably because you aren't breathing right when straining.