Knowing Fleur is interested in Okinawan based Karate here is a photo that shows how completely different body types can still become formidable Karateka (meaning there is no 'body type requirement' to become extraordinarily efficient). This is Gary Spiers (who was a huge bull of a man) being kicked in the head by the diminutive Higoanna Sensei.
I had very good relations with our local Goju Club and via them had the opportunity to train with both of these awesome Goju Karateka. Spiers was an 'animal' and there are many tales of his Door and Bodyguard exploits. the first time i ever met him he took a revolver out of his Jacket. he had just had a bodyguard assignment that required armed guards. Higoanna Sensei was only small but one of the strongest and most spirited Karateka I have ever seen - and i have seen a lot over the years!
I was privileged to be allowed to train with the Goju guys and gals and everytime it was a great experience. In many ways not unlike shotokan IMHO.