Hi guys !! Just a quick question re core strengthening exercises on the days inbetween runs.Up until this point( currently on extended rest due to a twinge in my right calf )I have carried out these exercises to failure( 2 sets each of 3 different exercises )Now am I missing the point here and over doing things ,and if so ,at what point is it "mission accomplished', and the object of any given exercise has been achieved for that session ?
Thanks in advance .