working out newbie questions?

[B-baller1234567]

Hey there. I'm a 15 year old and have worked out a couple of times but im a little unsure about some things.

is it good to go back and fourth between exercises for different muscle groups. For example, can i do 3 sets of bicep curls then go to triceps dips then go back to bicep curls after?

Is it good to have protein before or after a workout, and what is the best source of protein beside those protein powered shakes?

How much cardio is enough, as well as how do i know when iv worked out enough? i know its goo to push yourself but when is it time to call it quits?

What are some other tips for working out in a gym and at home with weights for a 15 year old. Im new to working out so your help and tips will be greatly appreciated.

Thank you

 

[sobelifelover]

nutritionally: you should eat complex carbs about an hour before activity, and protein after activity. The best sources of protein are meats (of course), eggs, nuts (particularly almond and peanut), whey protein powdered drinks (make sure to look for whey, not soy. it has an easier time getting the nutrients where they need to go in your body). Greek yogurt and fat-free yogurt or fat-free cottage cheese also have high amounts of protein per serving.
cardio: should be done 3-5 days a week. 25-45min time. Make sure you work hard during that time. Cardio help strip the fat from your abdominal area so your abs show more.
other exercise: instead of doing exercises for different muscle groups like you wrote about, try to alternate doing one upper body move with one lower body move.