simply by doing some movement repeat like a wallet or a uh or push-ups or dips for that matter repeatedly over and over and over until you reach that failure point Y or that quaking point in the case of a wall sit that provides a stimulus for more capillaries to be built into the system literally the the production or the um the trafficking of endothelial cells which make up the capillaries and basically little pipes feed the system withy and remove waste prodcts it's like Iration right imagine you had a giant field and you had two big pipes running down the outside well in fact if you want to make sure water gets evenly dispersed across the entire field you'll have a bunch of off-shooting little pipes and the more of those you have the more coverage you get