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.
Happy Birthday, Bella Thorne! See the 18-Year-Old's Best Looks, Plus Read the Love Note From Her Boyfriend Gregg Sulkin. Considering she's already a certified red carpet pro, it's hard to believe that Bella Thorne is only turning 18. And truthfully, there's no better way to ring in her big day than by throwing it back to her biggest style hits yet.