Los Angeles is a trend-setting city that is always on top of its game, especially when it comes to fitness. Many fitness trends begin in LA, and many of them really switch up what most initially think of when they picture exercising.  Here are a few of the hottest LA fitness trends that are a fun way to mix up your traditional exercise routine in 2020:  Up Flying Yoga  Up Flying yoga is an aerial yoga workout that adds the element of doing yoga on a hanging swing or hammock rather than on a yoga mat. It focuses on...