The more you move around the area you got Botox/Dysport in, will not last as long? Or is it all based on metabolism?

When all this was first getting traction (cosmetic use) there was a rumor floating around that if you practiced not using the affected muscles the Toxin would last longer. This was disproven, it really comes down to metabolism and genetics. Men typically need more than women, and genetics play a role there when you factor in simple muscle size. Doing regular treatments will keep you from getting creases in the future, which are harder to get rid of than wrinkles. Remember a wrinkle eventually makes a crease, that is why my client age group is 20s - 40s now instead of 50s - 60s like it used to be. 

Muscle movement over treated areas with botox/dysport has no affect on longevity of treatment.  On the average, botox/dysport typically lasts 3-4 months.  With regular treatments, your wrinkles will significantly diminish and prevent permanent lines from occurring.  

The amount of movement around the area has no impact on the duration of the effects of Botox or Dysport. Individual reasons for length of duration can include: genetics, muscle mass, number of units injected, age, metabolism and technique. I would not worry about attempting to avoid excessive motion as this will not affect the duration.
Best wishes.