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!
Check the wear of your shoes regularly. Make sure you examine and replace your shoes regularly. Most running shoes last for between 350 miles and 500 miles of running. Walking shoes should likely be changed every 6 to 9 months. If you walk 4-5 miles or so a day this works out to be around 1,000 â 1,500 miles of walking. Checking and changing your shoes is one of the best ways to avoid the doctor's office.