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Max Grow Xtreme A great way to work around muscles that stop you from performing certain exercises is to pre-exhaust. It is common for one frequently used muscle group to get exhausted before you work through all your exercises. This can be remedied by doing an isolation exercise, such as pull-downs, that work your lats without emphasizing your biceps. Once your lats are pre-exhausted, you can take on exercises like rows without weak biceps setting you back. http://www.supplements4us.com/max-grow-xtreme/