Many of us who want to get in shape would love to hire a personal trainer, but the cost is simply too high. Imagine your own virtual fitness coach inside your headphones cheering you on and pushing you forward when you exercise. After creating products for the Israeli air force and brands like Samsung and Under Armour, Israeli wearable tech company LifeBEAM is now making its own product – wireless, artificially intelligent headphones, or as many call them, "hearables," headphones that can learn about you as you workout. LifeBEAM's newest product Vi will tell you if you are running behind your usual pace on a familiar run and ask you politely if you want to speed it up. Or if your heart rate is getting too high, Vi will sense that and advise you to slow down.