Marilu Sutter has been a fitness instructor and personal trainer on the Main Line and in Avalon, N.J., for the past 30 years. She’s certified by the American Council on Exercise and the American Fitness and Strength Association. Her studio, MLS Fitness, opened in 2005 in Wayne and is currently located in Haverford. Marilu teaches cardio and strength classes to women of all ages and levels of fitness. She believes strongly in the importance of fitness for women to stay strong and vital at any age. She’s the mother of four children, the grandmother to four grandkids, and the wife of Dr. Francis Sutter, cardiothoracic surgeon at Lankenau Hospital.