Can I raise my long run mileage suddenly while still keeping my same average weekly mileage safety? ie: I currently run about 20ish miles a week with my long run being 7 miles. Is upping the ling run from 7 miles to 10 miles too drastic?
I am starting a training plan that stars out at 21mpw with a 10 mile long run, and then peaking at 31mpw with a 13 mile long run. The longest run I have run since December is 7 miles and I am training for a half marathon in April.