At what point should you change the exercises in your workout routine (weeks, months etc)? ADVERTISEMENT 2.34K viewsMay 10, 2011 0 Gus0 May 10, 2011 0 Comments I'm currently on a 3-day split routine with cardio on the other days with 1 solid rest day. 21 Answers ActiveVotedNewestOldest 0 Aaron0 Posted 0 Comments You are referring to a training cycle. Typically a Mesocycle is about 30 to 45 days. I would always suggest that a program changes in the following regularly: Exercise Range of Motion Intensity Volume Frequency You are viewing 1 out of 21 answers, click here to view all answers. Register or Login