Dependent on your fasting history and your metabolism this will either be wonderful or tough.
As a regular faster, and someone who enjoys exercise, my fasting heightens physical capacities. I cannot rest while I fast these days. On the first fast I had not energy. After that the fasting energy levels have been much higher, varying both during and within different fasts.
There are a number of cases of sports people using fasting as a "peeking" technique for sport.