There are 2 answers to this:
Yes: Cardio exercise (running, rowing etc) improves the efficiency of your heart and cardiovascular system. Cardio forces blood around the body increasing the size of blood vessels and capilleries that are the transport routes for nutrients to muscle. A stronger cardiovascular system aids muscle growth by supplying vital nutrients when needed.
No: Protein is broken down during intense cardio (from muscle) and converted to energy. This does waste muscle (leg muscle while running etc).
Although muscle is ...
Continue Reading →NOV