During my most recent teacher training session my asana teacher discussed things that may affect one's flexibility in yoga besides tightness of muscles. They included:
* bone structure (differs slightly person to person)
* gender (as a general rule women tend to be more flexible overall)
* time of day (ie in the morning we tend to be stiffer)
* temperature of the room/body
* amount of sleep one has had
* foods recently ingested - the more toxins, the less flexibility
I hadn't truly realised the effect of food on flexibility. This awareness may help me to curb my chocolate and coffee addictions!
Can anyone add to this list?