R Rulh New Member Jun 26, 2006 #1 Just how catabolic is cardio provivded it is not excessively long (under 45 mins)? Will it lead to slow twitch fibre development which could impede muscle growth?
Just how catabolic is cardio provivded it is not excessively long (under 45 mins)? Will it lead to slow twitch fibre development which could impede muscle growth?
