Running gaf, whats the max one should run a week? I've set myself on the runtastic app, and it says I need a minimum of 18 miles a week to make it by the end of the year. Is that too much or too little?
It's really dependent on your experience, age, current weight, injuries, goals and other activities outside of running.
18 miles is low unless you are starting, overweight or have no racing goal and just want "general fitness". It's perfectly fine. Don't stress about it. Just run and enjoy.
If you provide more details about your goals I can give more precise information. What is your previous max? For how long?
You can stop reading now if you don't want too much details going over the scope of your question.
Max number of miles is meaningless unless your goal is just to run the most miles. Max mileage is not the same as max efficient mileage. If someone just like to run lots of easy mileage fine. That person will not maximize anything other than its mileage. Usually people run either for health and/or performance.
I don't follow closely the research on running for health. But if I recall correctly, usually running 3-5 times a week about 20 minutes is the ballpark figure where the heart benefits for longevity and well-being starts to plateau. Don't quote me on that. The number is probably wrong.
The ideal weekly mileage for performance is as much as possible while you can recover from your workouts and avoid injury. It takes years of buildup to reach that sweet spot.
Rare are elites running more than 200. It also depends on your goal distance, marathons specialists run usually a little more than their 5k colleagues.
Us amateurs will likely never hit our real max effective mileage for numerous reasons. Not enough time, not worth the very low diminishing return, starting too late, too much too soon, injuries, etc. Our max effective mileage is also much lower than elites; we don't have their incredible bodies and genetics.
Plus, you don't run you max effective mileage all year long, usually just some weeks here and there. Training is done in cycle. Increasing mileage is just another stress to add and adapt to during training. If the only stress you have in your training is mileage you will run slow. Roughly: Lots of mileage mean a big base -> A big base means you can run harder workouts. -> Harder workouts mean a stronger stimulus -> You get more fit.
Don't compare with other people. They are not you. They don't run the same paces. 16 easy miles for an elite around 1h40, can be done daily without issue. 16 easy miles for most people is over 2 hours, not sustainable. Comparisons with elites are always extreme but the same is true between someone with 0-1 year of experience vs 5-7. No two people react to the same training the same way either.
I like to run 80-90 with some weeks at 100 in a cycle, 60-70 off-season. (and that might have been slightly too much over the years, see a previous post of mine)
Pros run 100-200. (with years of buildup and the luxury of having whole days to recover)
Most dedicated runners I know run 50-80.
A close friend runs 25.
It does not really matter.