We're being urged not to mix backyard sports with alcohol this summer after more than 100 people injured themselves with plastic cricket bats and frisbees last year.

ACC says summer brings with it an increase in alcohol consumption during outdoor recreational activities.

It estimates alcohol contributes to around 11 percent of all claims, while sports and recreation led to 450-thousand injuries last year.

ACC figures show last summer 23 New Zealanders were injured with a plastic cricket bat while 86 people were injured by a frisbee.