XO Cross Over Fitness in Sherman Oaks

Jessica Rose Felix, 26, of Sherman Oaks works out on the heavy bag during a pilates+circuit+cardio workout at XO Cross Over Fitness.  (Mel Melcon / Los Angeles Times)

Diannah Gilardi, 44, of Sherman Oaks, left, balances on a stability ball called a bosu while doing an exercise during a pilates+circuit+cardio workout at XO Cross Over Fitness in Sherman Oaks.

Diannah Gilardi, 44, of Sherman Oaks, left, and Nicole Rombeau, 27 of Studio City balance on a stability ball called a bosu while doing an exercise during a pilates+circuit+cardio workout at XO Cross Over Fitness.  (Mel Melcon / Los Angeles Times)

Michelle Scales, 18, left, of Sherman Oaks and Jeanne Fontana, 56, of Bel Air balance themselves on a stability ball.

Diannah Gilardi, 44, of Sherman Oaks gets into a pike position while doing an exercise at XO Cross Over Fitness.

Michelle Scales, 18, right, of Sherman Oaks does an exercise using a medicine ball.

Instructor Sara Lewis, center, instructs a student using a pilates machine called a reformer.

Instructor Sara Lewis leads a class at XO Cross Over Fitness.