Great article by Frank Zane explaining the “Carbo-Tempo” training plan that lead to his improved muscle density over a 6 month period in 1968.Muscle Builder / Power Sep 1968 Page #16 - Muscle Builder / Power (Issue Sep 1968) Page #17 - Muscle Builder / Power (Issue Sep 1968) Page #62 - Muscle Builder / Power (Issue Sep 1968) Page #65 - Muscle Builder / Power (Issue Sep 1968) Page #67 - Muscle Builder / Power (Issue Sep 1968)