Sleeping from 9-5 vs sleeping from 11-7: any discernible difference?

9-5 sleeping gives you a huge advantage of being able to get in a solid morning run and still get the kids to school on time, be at work early, etc.

No difference if you’re getting the same quality of sleep. Keeping the same routine is extremely important

I never see any difference. It's all propaganda.

Today I slept from 9:30 AM to 5 PM. I didn't finish watching the Masters final round until 9 AM.

What about having a social life?

I stay up later on Saturday night and sleep in on Sunday. No school for kids and no work Sunday. Church has early, mid morning and late morning options, so that;s always an option.

Social life starts early on Fridays, so I can still be asleep by nine.

Of course, a later schedule could work too for someone who doesn’t have to get the kids off to school, or go to work, or run before those things happen.

Why do your so-called friends require you to be out late?

Because I’m not 40+ years old.

Meh. I definitely don't get in 8 and always have a solid morning run. W Running. Frick all that other stuff.

get a load of mr 39 and his big social life over here

Where do you find time to sleep for so long? It's usually hard to find even 6-7 hours.

Yes, I’m discerning a 2-hour difference.

No effect! I ran my best times when I slept from 1 am to 8 am in grad school. You might find road racing tough if you are used to still being in bed when most races are already underway, but the tiredness wears off and you can nap after or catch up sleep the next morning.

You must be so cool with your youth and social life and all. We are so impressed.

I would recommend reading 'The Circadian Code' by Satchin Panda. There is much more to the timing of eating and sleeping and how it interfaces/interacts with other daily activities. The is a very important part of successful training and one shouldn't totally rely on 'shoot from the hip' message board'rs.

So if they all jump off a bridge....

How many dudes in your roster these days?

Sleeping 9-5 is a great way to avoid working during the day.

Also worth noting that there are genuine genetic differences in chronotype, i.e. night owls and early birds and those in between. 9-5 might work perfectly well for some people but be a real struggle for others. Studies have found that those with night owl genotype are underrepresented in sports like road running and triathlon, presumably because the race times (and perhaps training times) are so miserable for them.

Also, chronotype shifts with age, with teenagers shifted later.

I'm jealous. Grad school was the toughest time of my career. Barely found time to get in decent training. Since getting a regular 9-5, I've set my fastest times in almost every event 5k-marathon (sadly, I don't think I have the speed any more to challenge my mile time)