Maybe try spending time "on high altitude" when you are not working. Some athletes do this to increase their oxygen uptake. If you are not already doing physica

Maybe try spending time "on high altitude" when you are not working. Some athletes do this to increase their oxygen uptake. If you are not already doing physical training, you could probably increase your oxygen uptake by a lot just doing something that gives you a pulse of 130 bpm or more for 15-60 minutes or shorter intervals, start with 2-3 times per week.