’80s-style aerobics is making a major comeback in modern fitness, but why now? As today’s workout culture shifts toward connection and enjoyment, this retro trend is resurfacing in modern-day exercise.  © Getty Images Origins of aerobics During the 1960s, American Dr. Kenneth H. Cooper developed a range of aerobic exercises to help those with cardiovascular diseases.  In the ’70s, these movements became popular through the creation of exercise videos, starring the likes of Jane Fonda. By the ’80s, aerobics was a huge part of culture, with vibrant fitness classes that incorporated music and high energy movement to create a fun form of exercise.  Examples of popular retro workouts include callisthenics, classic cardiovascular exercises, and power walking. Requiring only one’s own body weight, these exercises are simple yet effective. Let’s explore some.  © Getty Images Calisthenics Calisthenics promotes muscle strength and coordination by using one’s body weight to perform movements like push-ups, burpees, squats and handstands. This has become an incredibly popular form of exercise to improve strength purely with one’s own body weight, and to …