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 & Zendaya: Selena Gomez Sings Our Theme Song! Bella Thorne stripes it up as she arrives at Varietyâs 2010 Power of Youth event at Paramount Studios in Hollywood on Sunday (October 24). The 13-year-old actress and costar Zendaya made a beeline to JJJ on the carpet to come and talk about their new series, Shake It Up! and how honored they are that Selena Gomez sings their theme song! Bella shared, âItâs so great.