Donna Mills maintains rigorous fitness routine at age 85

Actress Donna Mills, known for her role as Abby Cunningham on 'Knots Landing', maintains a rigorous fitness regimen at age 85. Her routine is rooted in her early training as a ballerina, which she credits for providing the discipline necessary to sustain her current lifestyle.

Her daily physical activities include 100 sit-ups, 50 leg lifts, stretching, and the use of a ballet barre in her home gym. Additionally, she engages in cycling for 45 to 60 minutes and plays tennis as often as five times per week.

Regarding nutrition, Mills has avoided sugar for many years, a decision influenced by the book 'Sugar Blues'. However, she admitted to being a ‘Doritos addict’, specifically citing nacho cheese Doritos as her one dietary weakness.