flexibility is specific
Flexibility can be genetic, but it can also be developed by stretching. Flexibility is an important component of fitness and exercise tends to increase the amount of flexibility in a joint. Flexibility is also specific to the type of movement needed for a sport so it is more important for some sports than others. Cyclists, for example, require less hip flexibility than hurdles, and swimmers need more shoulder flexibility than runners. Can You Increase Flexibility? Improving flexibility is done mainly by performing stretching exercises.