Whenever you start your workout routine you should get the blood flowing to your arms and legs.  I would start with a basic cardio exercise just to fire up those muscles.  You can do a number of exercises such as walking up and down steps, jump rope, or jog in place for approximately 2 to 4 min.  Then you begin your stretching routine.  This is what is considered a "warm up"  then you begin your exercise routine for the week.  Thumbs up, thumbs down, thumbs up!