Not according to the science.
Are you comfortable in your home, in stores, or in an office? The average is about 500-1000 PPM CO2. Working out inside a gym reduces performance only after it exceed 1000 PPM.
So, what is magic about trying to return the planet to the lowest CO2 levels in history? Why try to recreate the lowest CO2 levels in history which were right before the industrial revolution. Who decided that was a good idea?
Question authority... by reading... here is an article published by the National Center for Biotechnology Information...
https://pubmed.ncbi.nlm.nih.gov/26253981/#:~:text=However%2C%20this%20CO2%20fertilization%20effect%20was%20substantially%20compromised,biomass%2C%20respectively%2C%20and%20967.8%20ppm%20for%20leaf%20photosynthesis.