Justin Fassio earned his personal-training certification during his time in the military, when his passion for exercise landed him the chance to lead a physical training program for an Air Force–operations group. Once his time in the force was up, he didn't leave his love of fitness back at base—he brought it home with him. Today, he leads outdoor fitness programs for all citizens. Nutritionist Rachel Fassio has a background in Clinical and Holistic Nutrition, offering a wide acumen of current nutritional research. Her career now emphasizes weight management in all walks of life, ranging from digestive health to healthy eating while traveling. Her sports enthusiasm has also forged professional relationships with athletes and key athletic trainers. The partnership of the two is ideal at San Diego Core Fitness, where staffers emphasize that fitness and nutrition always work hand-in-hand. The varied boot-camp workouts fuse fun and motivation with functional training techniques designed to help build up neglected core muscles and regain muscular balance. Personal-training sessions are supplemented with nutritional advice and lifestyle counseling, and keeps semiprivate training sessions small so that each participant can receive individual attention. During outdoor boot camps, groups make use of whatever the locations offer as equipment—depending on the scenery, they wade through deep beach sand, run up open-air stairs, and bench-press park benches.