Time Constrained workout

Former Member
Former Member
I have recently strated swimming for exercise and fitness in the morning before work. I have joined my local Y, and only have 45 minutes to get in a good workout. I do 50's 100's and sometimes 200's freestyle reps. I would like to add to my routine to improve stamina and speed. All the workouts posted take over an hour, What else can be done in 45 minutes? Thanks