Ok heres an article I just read,this is not my opinon I just thought some of you may be interested in it.
There are a few studies looking at the impact of aerobic training on muscle gains. The definitive study on the compatibility of strength training and endurance training was reported in 1995 by Kraemer et al. Healthy,adult men were divided into groups that included those who performed only endurance training,those who performed only strength training and those who combined endurance and strength training. This study found that though the combined group(strength and endurance trained) made progress in both endurance and strenth measurments,there progress was not as great as in those who focused soley upon either strength or endurance training. In other words, men who only strength trained were stronger and made better progress in the gym than those who combined strength and endurance training. Those who only endurance trained were better runners than those who combined strength and endurance training.
Applying these results to the goals of a bodybuilder would suggest that combined endurance and strength training would at least slow any gains to be made in the gym. However,for those who are only lifting for generalized fitness,this and other studies have shown combined training can provide moderate benefits in both aerobic conditioning and strength.
There are a few studies looking at the impact of aerobic training on muscle gains. The definitive study on the compatibility of strength training and endurance training was reported in 1995 by Kraemer et al. Healthy,adult men were divided into groups that included those who performed only endurance training,those who performed only strength training and those who combined endurance and strength training. This study found that though the combined group(strength and endurance trained) made progress in both endurance and strenth measurments,there progress was not as great as in those who focused soley upon either strength or endurance training. In other words, men who only strength trained were stronger and made better progress in the gym than those who combined strength and endurance training. Those who only endurance trained were better runners than those who combined strength and endurance training.
Applying these results to the goals of a bodybuilder would suggest that combined endurance and strength training would at least slow any gains to be made in the gym. However,for those who are only lifting for generalized fitness,this and other studies have shown combined training can provide moderate benefits in both aerobic conditioning and strength.