"Following a training session, how long does it take before the effects of training show up in performance?
I'm sure it depends upon the type of session + other factors, but are there some general guidelines?"
Answer: Following the 100 day marathon plan, one phase is built into the next. And one single session build into the next. So it is impossible to say anything exact about one particular session improvement etc.
What you will see is that your fitness is improving as you go along (you improve very gradually but steadily). BUT max performance itself is strongly centered around the marathon itself. Especially in week 7 to 13, expect to feel tired from all the training !
I'm often asked what shoes I personally recommend to help stay injury free while running (on the 100 day plan) so I'll add a little bit about it at the end of these Q and A's.
Good shoes are crucial if you want to stay injury free during your marathon journey. In general, the best is to find a shoe that fits your feet according to your foot type.
However, these three shoes will do an excellent job with their mild correction - and will work for most runners :
1. Asics Gel Kayano (click for zappos reviews for other runners views)
The legandary shoe from Asics. You cannot go wrong with this one.
The most sold running shoes ever - and by every model seems to get better and better. About the same weight as the Kayano but the fit is a little bit different.
The 2150 is a great alternative for the faster work you'll be doing in the 100 day plan. It is one of the few shoes that "feels" like a lightweight one but at the same time has more than enough stabilty to prevent injuries with the marathon type length of some of the interval sessions.
A tips for international (non-US) runners : check out roadrunnerssports.com :
Example : Asics Kayano (RoadRunnerssports) they ship worldwide and it can really save you some money on your shoes.