Conor McGregor may have the one-punch knockout power, but in the other end of the spectrum, his cardio has been suspect at times. Two notable losses of his career have been because of gassing out: UFC 196 in 2016 against Nate Diaz, and against Floyd Mayweather Jr. last August.
People point to poor conditioning, but for Tristar Gym head coach Firas Zahabi, there is a deeper root to the problem.
“It think it’s partly genetic,” Zahabi told Joe Rogan during the recent episode of the JRE MMA Show.