What is the difference between assessing muscle length and flexibility? Is there a difference? ADVERTISEMENT 558 viewsMarch 3, 2012 0 Chris0 March 3, 2012 0 Comments 4 Answers ActiveVotedNewestOldest 0 Joanne0 Posted 0 Comments Assessing muscle length is not part of assessments a fitness professional would perform, nor a clinical exercise physiologist. I am sure there are differences, however, assessing muscle length it is not a measure I use with my clients. You are viewing 1 out of 4 answers, click here to view all answers. Register or Login