Exercise makes me dizzy

I'm trying to start walking again for exercise. The problem is I have been getting dizzy when I've been taking walks. I checked into it online and apparently you can get dizzy if you exercise too hard. Well I'm in terrible shape since I have barely moved for the past 6 months or so. I've gotten out and walked twice this week for a kilometer each time (according to the pedometer on my phone) Fifteen minutes of walking leaves me starting to get dizzy after maybe 8-9 minutes. And because I'm dizzy I can't really be productive at anything for some time after. I have to take a nap due to the dizzyness. I know I worked my way up to 25 minute walks this spring though. I need to cut back from 15 minutes to maybe 10, and then work from there.

In the weeks before I was let go, I was at the point that even walking down the street at lunch to get something would give me panic and exhaustion. I could only handle going to the place that was in the building or to the place directly across the street. I was beyond sedentary to the point of vegetative. By the end of the workday it was all I could do to get myself home. I didn't have the energy to even try to walk. Mostly I just stared at my home computer.

I can't say I have more energy, but I do seem to have lots more if you look at older blog posts I'm definitely not where I was. I need to build up some exercise to stay strong during the winter.

I've been able to set tasks and get them done.