Guess it depends on your definition of 'quick' really.
I don't think you have to train specifically for a 5k but maybe for a sub 20min 5k. What I was trying to say was, if all I had to train for was a 5k race I'd train a lot differently to how I am training for the marathon. For example I'd be doing a lot of speed work, lactate threshold and VO2 max stuff if I was training for a 5k, whereas obviously for the marathon it's all about distance.
Who knows, I haven't run a park run for a few months since starting my marathon training so long distance stuff might be more beneficial than I think.
Really don't know, just educated guesses.
I don't think you have to train specifically for a 5k but maybe for a sub 20min 5k. What I was trying to say was, if all I had to train for was a 5k race I'd train a lot differently to how I am training for the marathon. For example I'd be doing a lot of speed work, lactate threshold and VO2 max stuff if I was training for a 5k, whereas obviously for the marathon it's all about distance.
Who knows, I haven't run a park run for a few months since starting my marathon training so long distance stuff might be more beneficial than I think.
Really don't know, just educated guesses.