Stretching has many benefits including lengthening your muscle fibres, ligaments & tendons to allow them to move through their full range of motion for each desired activity.
Periods of inactivity, hard training sessions, sitting down at a desk or in a position for too long (eg. TT position on bike) can reduce the length of these soft tissues making movement harder.
GPC has put together a basic stretching session for you to use during the week after sessions or a general warm up. This is a general guide and you should contact a practitioner if you are experiencing specific tightness or fatigue in one or more areas.