What was the most popular form of aerobic exercises in the early years of aerobics?

In the early years of aerobics, particularly during the 1970s and 1980s, the most popular form of aerobic exercise was high-impact aerobics, often led by instructors in group classes. These sessions typically combined dance movements with rhythmic music, making them engaging and accessible. Jane Fonda's workout videos significantly contributed to the popularity of this trend, bringing aerobics into homes across the country. Additionally, jogging emerged as a widely embraced aerobic activity during this period.