I pointed out to my goalkeepers last night that we have six weeks until the start of the season. Six weeks to get in fighting shape. I will be providing the goalkeeping knowledge and repetitions needed, but much of the fitness work needs to be done in their time.
I like targets and the Stides app helps me in accomplishing them. Here are some of my favorite 30 day challenges that will get goalkeepers ready for the season ahead in slow increments.
See this article on core fitness