This is the 1295th most frequent Spanish word.
mantenerse
To stay, remain, or maintain oneself.
In this sentence, 'mantenerse' is used reflexively to mean sustaining one's own state of activity.
Ella tiene que mantenerse activa para preservar su salud.
She needs to keep herself active to maintain her health.
Here, 'mantenerse' indicates holding or remaining in a particular status or condition.
Después de mucho esfuerzo, lograron mantenerse en la primera posición.
After much effort, they managed to stay in the first position.
In this usage, 'mantenerse' is utilized to convey the idea of actively preserving one's focus or attention.