Hello. I'm not sure if this is the correct place to ask a question but I had a concern regarding my recurring vomiting while doing an intense work out.
I am a 25 year old male. I smoke regularly and drink occasionally. I also smoke marijuana daily. I used to exercise 3-5 hours a day 5 times a week from my high school years until around 4 years ago. (Football, wrestling, track during seasons and kickboxing all year around) When I used to work out, I didn't smoke, drank rarely, and smoked marijuana very rarely. I was around 150lbs when I used to work out and currently, I am 130lbs. I am slim but have athletic build. It's difficult for me to gain fat even though my diet consists of frequent fast foods.
I started going to a kickboxing gym around 6 months ago. (I've done kickboxing for 6 years before)
During regular class, I would rarely feel nausea. However, during intense exercise such as sparring, I would feel nausea and if I push my self just a little more, I end up puking. Mostly, it's just water as I eat around 6 hours before starting exercising.
I have never felt this before no matter how I pushed myself when I was very active. It's not caused by getting hit either as even when I am barely getting hit during sparring, I had to stop to vomit.
I also noticed that nausea is brought on by aerobic exercise and not anaerobic exercise as I have never felt nausea during lifting weights.
I realize that many habits have changed from when I was younger. I've picked up smoking cigarettes, drinking occasionally, and smoking marijuana daily. My diet has also changed drastically as I eat mostly what others would consider unhealthy food. Because my habits and diet has changed drastically, I cannot really pick out which habit or diet is causing my nausea during intense work out. Although I realize that quitting everything is the healthiest option, I do not want to give up everything.
I've already tried to look up the cause of my nausea. I can rule out low sodium intake as I like my food salty. I drink sips of water regularly during exercise so I doubt it's caused by dehydration.
Heat exhaustion sounds a bit probable as by the time I'm vomiting, I'm burning up although I've always felt this even when I never had to deal with my nausea.
My best guess is that the cause of my nausea is smoking cigarettes regularly. However, since this is just my amateur guess, I would like to know the cause of my nausea during intense work out.
Why am I experiencing nausea during intense work out? Please help me out so I can change my lifestyle so I won't feel this during work outs!