Today, athletes use more structured interval training workouts and HIT (High-Intensity Training) to build speed and endurance. 1  This variation of interval training and speed work can be a simple or sophisticated routine, but the basics are still the same as the original fartlek training.
Annabella Avery Bella Thorne (born October 8, 1997) is an American actress and singer.
Bella Thorne Denies Cheating On Tyler Posey & Dating Charlie Puth. Bella Thorne is clearing up her relationship status amid cheating accusations. The 19-year-old actress took to social media after Charlie Puth tweeted that he didnât know she was dating Tyler Posey and felt bad for him. PHOTOS: Check out the latest pics of Bella Thorne.