I’m getting nausea and & headache from HIIT cardio. This is more often when I’m getting back into things. My job makes it easy to not exercise for a week or two. However, sometimes I still feel sick from exercising when I’m already in good shape.
This is happening on a stationary bike or hill sprints, and I go until I’m totally out of breath, then keep going while out of breath for another 15 seconds to a min.
Sometimes this makes me feel sick as a dog. I’m aware there are ideas out there about how to reduce this, but my main question would be, is this dangerous? I don’t know if my body is saying to stop it because it senses a problem that will cause harm, or, maybe this is just a physical reaction that can be ignored.
If it is dangerous, then by all means tell me more about how to prevent it. If not, I can motivate myself to keep going and block it out of my mind.
Here is a reply from a different forum I found useful. Maybe others will find it useful also.
“I can't tell you how dangerous what you're doing might be--that would depend on some individual factors you didn't provide any details about, like any health issues you might have, your overall conditioning level, how long those exercise sessions are, etc. Nausea can be "normal" after any maximum intensity exercise. But it's not necessary to exercise to the point of nausea to get the health, fitness and weight management benefits of HIIT exercise, unless you're in training for an event or activity that requires the ability to perform frequently at that maximum level. And it's not a good idea to do that kind of ultra-high intensity exercise on an intermittent basis, after a week or two with no exercise at all. You'll be better off working some HIIT intervals into an overall exercise plan that includes some regular, lower intensity work as well.”