I'm a near-60y-old runner and I've struggled with this on and off for a long time, maybe all my life (which would explain why I avoided athletics in my teens). I get a little dizzy sometimes.
Rarely, I get a-lotta dizzy, notably a few weeks ago on a trail jog where I had to take a break leaning against a tree. Urg. I was really seeing stars that time. After a few minutes, it went away, and I jogged two more miles. Go figure.
It seems to help if I drink a big glass of Nuun (electrolytes) before a run. I had not done that on the trail run described above. On very long efforts (cycling, hiking, 60+minute runs) I'll sometimes use Gu or a banana to prop up the blood sugar. But, getting dizzy after 15-30 minutes shouldn't be a blood sugar thing... I think!
Recently, I read an account of someone who tried taking a magnesium supplement after running. They reported a big improvement. Nuun really doesn't have much magnesium. Now, I'm trying it, however, I'm also taking meds that have to be taken 4h away from it, so I'm limited in my experiments.
Anyone else get the dizzies when exercising? Any other solutions out there?