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!
In general, most experts will suggest changing your running shoes every 300 to 400 miles. Thatâs a pretty good gage for the most part, but as footwear has become more versatile and more specific for different types of running, there are different materials being used for different types of shoes.