In general, it's not a good idea to train a muscle group more than once a week or you run the risk of overtraining them. Basically, when you lift weights, you're actually tearing the muscles. The muscles then need to repair them selves, and they do so slightly bigger than before incase you need to lift the same weight again. If you don't give them time to repair them selves, they'll just get fatigued from being constantly torn without being able to repair. The time they repair them selves most efficiently is when you're asleep which is why it's important to get at least 7-8 hours sleep a night if you want to make significant muscle gains, along with eating correctly obviously. High protein, low fat works best for me, with 4-5 days low-moderate (mostly complex) carbs followed by 2-3 days moderate-high carbs a week.
If you're doing a 3 day split, a good place to start might be:
Monday: Chest, Triceps, Abs
Wednesday: Back, Biceps, Calves
Friday: Shoulders, Quads, Hamstrings
spending about 1-1.5 hours working out each day.
Only do a short cardio warm up on these days and do any intense cardio work on others. As you get used to doing the same routine, you'll probably stop growing which is when you need to change it to make your body grow.
Hope that helps.
| 
Lifting Weights 
Linear Mode
