Precious Roy wrote:
Nailing splits on every workout is the most overrated. In the US, we are so OCD about workouts and statistics that we end up wrecking our athletes just to follow a somewhat arbitrary training plan. The E. Africans understand that you sometimes have bad days and sometimes are not in good enough shape to follow the schedule. They will bail from a workout and do it again later in the training cycle instead of forcing themselves through it or getting all psyched out by not hitting splits.
Most underrated is hill training. People never do it with enough consistency to fully realize the benefits. Too many runners just do it during a "strength" phase and then lose the benefits by neglecting it during a "specific" phase.
This ^ was the first thing that I noticed when I did workouts in the USA. Honestly guys running 5:10 p/mile on a tempo instead of 5:00 p/mile or whatever split your coach gives you isn't the end of the world, there are too many variables to have a perfect workout everyday.
Many if these have been mentioned but in my opinion:
Overrated
Weight Training (IMO, until you cant get any benefit from running more this just tires you out. Do core and some basic stuff (push ups/sit ups) instead.
Cross Training (Unless you're injury prone or running more than 100miles p/week and want to get extra aerobic work in, just run more and skip the bullshit)
Carbo Loading (unless you're doing ultra, otherwise you're just getting fat)
VO2 Max (I have the same VO2 as Frank Shorter but I'm not running 2:10 marathons any day soon)
Underrated
Long run (From reading some of the other posters. I wouldn't do a 20miler in the middle of track season but during specific blocks of training these are crucial IMO).
Slow/Easy/Recovery runs (If you race fast and do hard workouts running 8-9 min p/mile twice or so a week won't make you slow)
Soft Surfaces (Do as much as possible on grass even if it means running over people's lawns)