I really know very little about training for distance events so I am asking for help.My wife just finished the 5 K and decided she was not ready for the 10 K this year,but wants to be ready next year.She is 61 with a strong swimming background from college.She hurt her shoulder and life intervened so she didn't swim for about 20 years.She has eased back the last couple of years.She is consistently doing 1500M 3X per week.She thinks she is ready to increase distance and times per week,but every time she has increased very much she has gotten a return of the shoulder pain.She wants my help coaching so I am asking for yours.