The best sexy female abs on Instagram! (HOT PHOTOS)
These chicks know how to stay fit and they've got the abs to prove it!
High-Intensity workouts could slow down your aging by almost a decade!
Frustratingly, only quite severe levels of physical activity seem to make a difference in this respect...
Watch former-UFC champ Ronda Rousey get “schooled” by student (video)
Rousey back in the gym