Getting ready for Oslo (half) Marathon. When I first started running again I got a pair of Mizuno Wave Runner. They felt fast, unfortunately they gave me huge blisters. They also felt quite hard when running, so wanted some softer shoes.

For the last year I've been running in my Asics Kayano XII. I'm very satisfied with these shoes. They fit my feet perfectly, and they are as soft as I like them to be. But they are also quite heavy (355 gr). In cycling the weight at the wheels is quite important. What about the weight at your feet? Again, Google is your friend. By searching I found out that:

"The common rule of thumb is that you can expect to drop 1 second per mile, for every ounce you shed on your feet."

So I went to my friend Martin at Intersport and grabbed a pair of Asics DS Trainer 12. The DS Trainer is about 255 grams. This means that I will save 200 grams in total. So how much time should I be able to save? 200 grams is 7 ounces. Half marathon is 13.1 miles. Doing the math tells me I should be able to save about 1 minute and 32 seconds. Not much, but at least that should help me get below 1:40. Well in a few days we will know the answer.