The Shift in Women’s Fitness: The Most Popular Muscle Groups and Why We Train Them In the last decade, the landscape of women’s fitness has undergone a radical transformation. The “thin-at-all-costs” mentality of the 1990s and early 2000s has been replaced by a “strong-is-sexy” paradigm. Today, women are flooding the weight rooms, prioritizing muscle hypertrophy (growth) and functional strength. While a balanced full-body approach is always the gold standard, certain muscle groups have surged in popularity due to aesthetic trends, metabolic benefits, and postural health requirements. This comprehensive guide explores the most popular muscle groups for women, the science behind why they are prioritized, and how to train them effectively.