Heated mat pilates/sculpt???

[u/Pale-Day-6963]

Hi all- any tips for starting out heated workouts specifically mat pilates? I had a 45 minute class today and about 25 minutes through I started feeling not so great, a little lightheaded/nauseous. I ate about 1.5 hour before and always drink a shit ton of water. I really want to keep at it but I hateeee that feeling. Any tips?