cool, good for him wrote:
my friend is a 2:17 marathoner and when he's trying to get back into shape, he can run about 16:00 for a 5k in 4-6 weeks of training off almost no runing. My equivalent to that baseline would be like 17:30 off the couch. Talent and genetics...
natural talent and never truly falling too much out of shape is what matters here.
This.
My first sub 3 was in 1978 (age 20), my last one was 5 yrs ago, and going for one again (cross fingers) in next year..time running out.
Last 'marathon' en route to an ultra was two years ago , passed marathon in 3:15, off 3 months 'good' training ( 60 -70km/wk peak), just longer runs in that bracket because of time frame (had emergency abdominal surgery 6 months before ultra and one month totally off).
To the emboldened quote above, that month off was rare in 40 yrs. Even when not running competitively, or any marathons even for a few years, I always run at 'least' 3 or 4 5km runs/wk...it has just been part of life...never been out of shape, weight has never been as high as now (3kg over age 18 yo weight, and 10kg over PB era weight).
That is the key..consistency.
Usually I only do 60km to 70km weeks anyway for a marathon, never could handle high mileage, but could handle faster mileage, so I adapted to that, even at PB era only max 110/120km
To his comment...no everybody does not have the speed to run a fast marathon, but most can develop the speed to run the required 5km that will get you a sub 3 at the right age...you do need an 18:20 or better, some can get away with 18:40. That is not super fast, were it not for bad habits developed- body weight, sedentary lifestyle, poor form etc...
As for slow running teaching body to burn fat, no it doesn't, look it up in physiology textbooks. Everybody burns both CHO and fats, at their own particular max rates. CHO is quicker fuel. Both is burnt at every speed, so its logical that per km you will burn more fat at slower speed...but at approx the same time rate...you are out there longer. If you are going to run faster you are going to have to burn fuel faster, and that means CHO
In marathons, it is not the lack of fat that ever gets you down it will be a lack of available CHO
Think of it as having both petrol and diesel in the same car
Please don't flame or troll if you disagree
(sad that one has to put that disclaimer in almost every LRC post though...there will be someone ;-)