portrait of female caucasian athlete in good fit sitting on big fitballs

20s 30s activity adult aerobics alone and athlete athletic big body bodycare caucasian cheerful class composition exercise exercising female fit fitball fitballs fitness flexibility girl good gym health healthy horizontal ideasportrait image life lifestyle loss mats natural one people pilates real sitting smiling sport sportswear sporty stretch teamwork thirties training twenties warmup weight wellness woman workout young