Kayla Itsines sold her fitness platform, Sweat, to iFIT in a $400 million deal. The Sweat app generated nearly $100 million in revenue last year. Itsines went from training clients in her parent's ...

Kettlebell exercises are a no-brainer for strength training, but if you're not quite sure where to start, a complete kettlebell workout plan could be what you need. For this 14-day challenge, Sweat ...