How to get stamina in Martial Art?

I am martial artist & I perform energetically all kata & stepping in Dojo. But while I perform kicking I soon get exhausted within little time. This does not happen while I punch. Please guide me how can I overcome this problem. (Please mention, if you know any exercise routine which can improve stamina or any... show more I am martial artist & I perform energetically all kata & stepping in Dojo. But while I perform kicking I soon get exhausted within little time. This does not happen while I punch. Please guide me how can I overcome this problem. (Please mention, if you know any exercise routine which can improve stamina or any best martial art site in this regard)
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