When I first started running, I did the C25K program. Doing the first few workouts, with running for a minute or two, NBD. When I got up to running the whole 30 mins, the first ten minutes was torture at first. Like you said, brick wall, and the 30 mins seems SO long. Just keep going. Drop the speed/intensity if you're gasping for breath, but pick a pace you can maintain and just keep going. I found that once I got good and warmed up, I could go on forever, so it does get better. Also, after a few weeks, even the first ten minutes was easy, so the brick wall feeling doesn't last forever. Whether it's elliptical or running or whatever, a good warm-up helps...5 mins of walking, then some range of motion stuff to lube up the joints (just gently move your joints from the top down: neck, shoulders/arms, hips/knees/ankles). I usually will do some light stretching here as well. This helps ease the transition to more active cardio, and should help eliminate the brick wall, too. Like others have said, get some tunes, or another good one is audio books, to pass the time. I get audio books from the library. They have some cool ones now that are mp3 type, just a little player that is easy to take along.
