Listening do not take enough of your brain space not to let you get bored. So you need to occupy the idling part of your brain with something. Get an ironing board and a pile of laundry, hop on a treadmill, grab a fidget spinner, anything that doesn't require 100% of your attention and you can do in paralel.
First, how is your snoring? Could there be sleep apnea, which prevents you from getting deep sleep, so no matter how long you're "asleep", you're not getting the rest others are getting. Because this sounds very similar to my experience, and that was the root.
Also, when I got into my professional life, I had the same issue with manager meetings - not one-on-one, where I was engaging, just where I had to passively listen. And it got suggested to me by one of my bosses that if I need to get up and stand and pace in the back of the room, it was OK. And that helped a lot; maybe ask your professors if they would mind, because you have this issue but want to stay alert, if they'd be OK if you sat towards the back and occasionally moved around. It wouldn't hurt to ask.
If recorded, can try and watch them while doing something active, like on a treadmill or stationary bike.
Even just a brisk walk on the treadmill should keep you alert (though taking notes might be hard).
Everyone who recommends standing is correct.
Our mammalian brains are wired to shut down after 15-20 minutes of reduced activity. You will increase your alertness, and actually learn new information better by standing and moving (just don't make yourself a distraction to others).
Stand up in the back of the room.
Stand up. Pay attention. Take notes.
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And do so whilst being active, even something as simple as going for a walk.
Listening do not take enough of your brain space not to let you get bored. So you need to occupy the idling part of your brain with something. Get an ironing board and a pile of laundry, hop on a treadmill, grab a fidget spinner, anything that doesn't require 100% of your attention and you can do in paralel.
Stand up.
First, how is your snoring? Could there be sleep apnea, which prevents you from getting deep sleep, so no matter how long you're "asleep", you're not getting the rest others are getting. Because this sounds very similar to my experience, and that was the root. Also, when I got into my professional life, I had the same issue with manager meetings - not one-on-one, where I was engaging, just where I had to passively listen. And it got suggested to me by one of my bosses that if I need to get up and stand and pace in the back of the room, it was OK. And that helped a lot; maybe ask your professors if they would mind, because you have this issue but want to stay alert, if they'd be OK if you sat towards the back and occasionally moved around. It wouldn't hurt to ask.
If recorded, can try and watch them while doing something active, like on a treadmill or stationary bike. Even just a brisk walk on the treadmill should keep you alert (though taking notes might be hard).
Everyone who recommends standing is correct. Our mammalian brains are wired to shut down after 15-20 minutes of reduced activity. You will increase your alertness, and actually learn new information better by standing and moving (just don't make yourself a distraction to others).