freddy said:
well, running will slow down strength/mass building, simply because it make your body lose energy. your body can only repair so much. weight training is a good suppliment for running, so they are not necessarily antitheses, but if you do alot of one, it can hurt the other.
I disagree. The problem many people run into when running when trying to gain mass is a lack of calories to compensate for the extra activity they are performing. As long as you take in enough calories to make up for the running then you will be fine. For example, if your bulking daily caloric intake is around 4500 calories, and you do 30 mintues of cardio which burns an extra 600 calories, you in turn need to take in a total of around 5100 calories that day to make up for the extra activity.
Another problem many have with cardio and weightlifting is where they place the actual cardio workouts. Here are some guidelines you should follow when placing your cardio workouts.
---Try to avoid running before a resistance training session. After running you will not be able to perform on your lifts as well. You want to be able to lift as much as possible in the weightroom while on a bulking stage. Remember, more weight lifted in turn means more hypertrophy.
---Personally, I wouldn't place the cardio workout after a resistance training session either! The time directly following a weightlifting session is a crucial period where your body starts to recover from the stress you placed on it. You need to be feeding and resting the muscle after lifting it. Going out and burning more calories won't help you out much here. You could just set in pace catabolic effects by doing cardio after weightlifting.
---If you can, put a little space between a leg training day and your cardio workouts. You legs good worked pretty heavily on cardio days so they need the rest. Same situation occurs after a leg day. The day after doing squats, SLDL's, lunges, ect. your legs will probably be pretty worn out. If you HAVE to do cardio workouts around your leg workouts then take it a little lighter than you normally would.
Remember, the most important thing you can do is to eat enough! If you burn 500 calories doing an extra cardio session then you need to take in 500 extra calories that day to make up for it!
Scott