a 20-year-old trainer is practicing pilates on an elevator chair, lying on her stomach supporting herself with her arms

pilates exercise show device gymnastics woman workout elevator chair instructor twenty years old trainer lying on stomach legs straight supported arms young tense body view from side back working abdominal muscles stretched out horizontal health movement silhouette lifestyle fitness fit smiling athletic blonde vitality balance stimulates circulation muscle strengthening breath control spine stabilization tension joint posture correction healthy breathing improve human machine