I usually run 50 minutes for 8 km per day. I notice that my runner's high on the treadmill appears at 25 minutes after start. I experience weightless and I could run forever. But my mind tells me that I have to stop; otherwise I will probably hybernate like a polar bear for the rest of the day.

For the first time, I jogged for 65 minutes. During the last ten minutes I ran faster and felt like I could run forever. When the treadmill stopped and I could not get it to turn on again (first time on treadmill), I think I experienced runner's high. My body was floating and yes, my mind and by body felt separated. It scared me and I thought there was something wrong with me but after reading all of your comments, I'm realizing this was probably runner's high. I walked around for a couple of minutes in the gym and eventually came "back to earth".

I love the er- energy bar comment too, lol.. but .. all I have to say is for u guys to cut down ont eh weed, atleast not before running... lol
Just joking, i have been getting the rush lately, after the 50 mins in my run, but im on a tread mil because of the cold and but i dont know about the "forgetting whats surrounding me" or "seeing staircases" if I lose concentration or forget that in a tread mill or running outside i would either face plant on the concrete get lost.. or ger hit by a car... so.. but i guess after i do the 50 min time i do get the drive and painless almost renewed feelinf to keep reading another hour

Great, another excuse for me to train more! As if my Iron-Widow wasn't testy enough. Runners' High hits for me over about an hour in or upwards of my endurance heart rate zone (~150 bpm) - It is not a myth ... It's what keeps me out there for the rest of the afternoon.

I am SO glad to read this. I come from a family of heart disease and heart attacks.

I ran a super hard run last week and felt that surge of everything at the end. My heart was racing. But every time I do a tempo run I get a little worried about whether I'm pushing myself - whether this is good for my genetic pre-disposition to heart problems. I'm glad to to read that some pushing is good (and yes, I realise that you and those you cite are not suggesting going ALL OUT).

All that said, I also have to be very careful about the other factors - the bigger factors that would lead to a potential heart attack.

Last night I ate my second UN-heart smart meal of the week. A cheese burger (brie no less) with bacon. Bad, bad, bad ... I NEVER eat like this normally so I'm probably going to live through it. Still, I gave myself a slap on the wrist, had some bran and green tea and lots of water but also had a good long think about my risk factors. "Honey, we need to have more things with beans in them ..." I said. "No more brie burgers."

I am also training for my second marathon and I get runners high usually 50 minutes into a long run. Dont get me wrong, I still feel some "serious pain" in runs of 30 km or more but I do know the high is there and now understand that it could be helping me better control the pain.

Fully agree with previous post: everyone who can should run.

I love that moment when you become separated from your surroundings. Time blurs, pain dissipates, stimulii subsides. It is so euphoric that I dont bother to share details of it with non-runners - they don't get it. I get a similar feeling when I'm snowboarding, and the conditions are just right, but that is more of a connection to the snow and my board, not a disconnection.

For me the best runner's high was running on narrow windy forest trails, after about 40 minutes my body would enter a relaxed tranquil state and I would speed up. The extra bit of speed made me feel as if I was zooming along the path almost effortless.

I never ever timed myself to see if I was actually going faster, the appearance was way better than the real thing.

Its good to hear that the runner's high may have beneficial effects. Either way, I'll keep running. I get the high after 35-40 minutes of running, and like Frenchie, it helps keep me motivated to stay in shape. I think a lot of "runner's high nay-sayers" just haven't run long or hard enough to have experienced it.

LOL, love the last line about the brownie, er that energy bar. Hehe. But yeah, that runner's high is a wonderful thing. Sets you gliding along a path of happiness. You feel invincible, I'll agree.

Runner's high is one of the reasons that brings me out the door 5 times a week. During my training for my second marathon, I got the high on every single long run I went on. It came around 10 to 12 km averytime and stayed with me for however long I ran, making the pain and tiredness of a 35 km run seem all worthwhile. No substance has ever made me feel this good... More people should try it!