https://blog.gongquiz.com/2021/10/17/co2max-%eb%8a%94-%ea%b3%b5%ea%b8%b0%eb%b9%84m%ea%b0%80-%ec%96%b4%eb%96%a4-%eb%95%8c%eb%a5%bc-%eb%a7%90%ed%95%98%eb%8a%94%ea%b0%80-%ea%b0%80%ec%8a%a4%ec%82%b0%ec%97%85%ea%b8%b0%ec%82%ac-2011/