For a long time bodybuilders were very concerned about keeping rest periods short and feeling the burn – in fear that not training this way would short change their muscle gains. Newer research tends to challenge this belief and so today we review that research. John always reviews the full-text of every article, but you may view the free abstract by clicking here: http://journals.lww.com/nsca-jscr/Abstract/publishahead/EFFECT_OF_DIFFERENT_INTER_SET_REST_INTERVALS_ON.96784.aspx