Some entrepreneurs and trainers played a vital role in the rising exercise culture.

• Health clubs were popularized by the Vic Tanny Gyms chain.
• Weight-lifting for women was popularized in the 1930s and 1940s by female-bodybuilder Abby "Pudgy" Stockton.
• In 1974, the Equal Credit Opportunity Act paved the way for women to go out and sign up for exercise classes on their own.
• In the '60s and '70s, exercise became a more accepted and celebrated pursuit.
• The '80s and '90s saw the expansion of a conversation about diet and fitness.