Is a double on a 14 mile long run day a stupid idea

What are your LT and ST goals as well as your current fitness?

LR: run another marathon in June and get a new pb (sub 3:50) but also not get injured

ST: do well with this weeks training

some would say 14mi isn't even a long run.

it can be ok if the 5mi is a slow recovery run IMO. but if your target marathon pace is 3:50 then i'd say 19mi in doubles is a lot of time on feet for one day and not worth it. 5mi isn't much stimulus anyways.

What's your overall weekly mileage? Is 14 your regular/longest long run right now? If so, forget the 5 extra miles. You'll do more harm than good. Different story if you're marathon training or something and regularly run 20+ mile long runs.

Honestly even if you do regularly run 20+ mile long runs, this is still a dumb idea.

Yes, go ahead.

Of course it's a good idea. Why would it not be? Do it easily and it will help you recover.

I got a stress fracture the last time I did a 13/6 double, but you do you.

Would't recommend it. Instead run a 15-20 mile easy Specific long run with faster parts in it close to LT pace. Then close for the day and rest up. 🧙‍♂️🇸🇪

No its not.

Two summers ago I was running 40 miles on the weekend doing 12/8 on Saturday and 12/8 on Sunday with both runs in the AM and felt great running them. I liked breaking them up because I run in a very hot city and gets old running in wet everything, especially the shoes.

Guessing with a 14 mile long run you're doing somewhere around 60mpw? I wouldn't double off of your long run. You get marathoners doing an easy double (4-5 miles) off of their medium long runs (12-15 miles) but their long runs are 20+ miles. They don't double off of their 20 milers so I wouldn't double off of your 14 miler. If you can double on a different day this week try that out. I wouldn't go from maybe no doubles (?) to doubling on your long run day.

A 14/5 double is a lot easier on the body than a 20+ mile long run.

The answer to the OP all depends on what they're used to, ie what a typical training week looks like.

Listen to what your body tells you. Er on the side of easy.

I started doubling off my 20 milers after maxing out everything else. It took a few years to get there but I feel significantly better the next day. YMMV

if you are blaming a single day of training on your stress fracture, I dont think you learned the lesson you needed to from the experience

Listen to your body, OP. How are you feeling right now? How do you think you might feel after running another five miles today? If you're already sore or feeling fatigued, the extra run probably isn't worth flirting with the danger zone and getting injured. Alternatively, if you're feeling fine, go for it, but absolutely don't be afraid to cut it short if your body isn't up to it.

Yeah man, this is a good idea. Used to do it all the time after Sunday long runs. 18m AM and then 4m to 6m PM. Obviously, the evening was super easy.

After college when working full time, I would load up my weekends. Wasn't uncommon to do 40+ miles each weekend between a long workout on Saturday and long run Sunday.

One thing to keep in mind is that I always did max 30mins super easy on Monday, usually after work so I'd get almost 24h of complete rest. I found it important when working and training to take one super easy day per week.

You're probably better off extending the LR a few miles then you are doing a 5mi double. The goal of a LR is to run long and then extend the recovery- running a 5 miler, even a slog, undoes, partially, the LR entirely.

Plan your runs more efficiently!!