IntenseX : All of you efforts you have done in the last year, all of your training prior to CrossFit, your entire fitness/sports history has brought you exactly where you stand today. Training is also offered in a variety of outdoor locations and through mobile service. There is also research that indicates training for more than 90 minutes in one session builds new capillaries, thus increasing the amount of oxygen your blood can deliver to your muscles. Getting up early and running for 15 or 20 minutes each morning is a great way to improve your travel experience and personal fitness.