The first view is a good way to start thinking about logarithms: logarithms are exponents. That's the view introduced in this section. Another view is that logarithmic functions âundoâ exponential functions, or (more briefly) logs âundoâ exponents. and is the subject of more advanced lessons.
Report Abuse. You need to replace shoes every 300 miles, so I would say run at least 30 miles in them before a race, to break them in well. 50 would be optimal, but 30 would be fine. That way you get a week or two to figure out what spots you need to tape or ice pre-race.Good luck in your 5k's!eport Abuse. You need to replace shoes every 300 miles, so I would say run at least 30 miles in them before a race, to break them in well. 50 would be optimal, but 30 would be fine. That way you get a week or two to figure out what spots you need to tape or ice pre-race. Good luck in your 5k's!
Also, having a fresh pair of shoes as a reference will help you notice when your old ones are ready to be replaced. Although you should replace your shoes every 300 to 400 miles, there are ways to make sure they last until the higher end of that range. Follow these tips for making your running shoes last longer.