Quote Originally Posted by tamara_69
I've been running a few months now, and can run 3 miles without stopping. At the end, I don't want to do more, and I'm slow, and my heart rate is WAY higher than when I cycle, like 176 or so by the end of my run. (I'm 36.) What would be the best way to condition and build mileage and get my heart rate down in a manageable range? When I cycle I have so much more control over it than when I run. I'm also concerned about too much anaerobic training, so I'm only running 2X/week, and I try not to run and cycle on consecutive days. Is this a good idea?
I had the same problem as you when I started running, i.e. difficulty to keep my heart rate under control.

I found that run/walk helped. Time is also key. Intervals training is another (and run/walk is a form of intervals training I'd say). When I started my season of more serious training on the bike, doing hard intervals, my heart rate suddently became much more manageable while running.

After all, the reason why we get better while training is through adaptation to higher demands, which happens during recovery. You want to make sure to apply this principle during specific training sessions (by doing intervals, for example, instead of keeping your HR / effort constant during a whole training) and in your general training plan (by having a progression of intensity with one week of recovery every 3-4 weeks of increased effort)...

Take this for what it's worth, I'm not an exercise specialist, just a happy practitioner!