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!
â¢ All running shoes wear out eventually. â¢ Once they do, they lose their effectiveness. â¢ Change your running shoes after 450 to 550 miles. â¢ Keep a mileage log so you get an accurate record of their use. â¢ Otherwise look out for some obvious signs of wear. Podiatrist and ASICS PRO Team member Clifton Bradeley explains when and why you should be thinking about changing your shoes.