There could be several concerns here: Weight, height, age, physical shape, or medical conditions. If the latter is the case, please tell your doctor what you’re getting yourself into and have his permission to practice kitesurfing. If your weight is on the light side of the scale then you can simply pick smaller gear, aka smaller board, smaller kite, and smaller harness and you will have an advantage when it comes to jumping, you’ll be able to jump higher than other riders. If you happen to be on the heavier side of the scale and thinking “Will the kite generate enough power to pull me? Will equipment be strong enough to support me? Will those thin kite lines be able to lift me off water?” If this is the case, here are some technical details about our equipment. New models of kite lines support over 1,000 pounds each. There are four lines coming from you to the kite, so, you do the math. When it comes to board selection for a heavier rider there is plenty of room to go to. You can use big twin tips, which can be over 165 centimeters long; you can switch to windsurfing board, or you can go all the way to SUP board, it will float with you standing on it, so, there are options. You can have harness custom made for you, as well as the wet-suit if you need one. You are maybe thinking that you are too old to learn to kitesurf… Well, age is only a number and a lot depends on your mindset, how extreme do you want to ride, and the permission from your doctor (if you have one). Here is something rather inspirational:
And here is another example on another side of the spectrum:
And in case you or someone you know, has a serious medical condition like immobility, for instance, then there are companies out there that specialize in special equipment and they may be able to help out. Here is one of them: CLICK THE LINK