30 mins, everyday for a month

[why]

Originally Posted by Shraka

That means first thing in the morning the only place your body has to get energy is from your muscle and fat stores.

Nah...glycogen isn't used much as a substrate during prolonged aerobic activity (e.g. running), and even then glycogen stores from the night before will be depleted in the liver -- not in muscle tissue.

 

[Shraka]

Originally Posted by why

Nah...glycogen isn't used much as a substrate during prolonged aerobic activity (e.g. running), and even then glycogen stores from the night before will be depleted in the liver -- not in muscle tissue.

But wont it still break down muscle tissue? This is the LAST thing someone on a diet wants.

 

[why]

Originally Posted by Shraka

But wont it still break down muscle tissue? This is the LAST thing someone on a diet wants.
For any sensible amount of cardio, no. Not any moreso than other forms of cardiovascular work, at least.