About Marni

Marni is a Long Island based personal fitness trainer whose clients include new moms, businessmen, teenagers, baby boomers and every day men and women looking to improve their overall well-being. She combines boundless energy with a positive attitude to make each training session a fun, yet challenging, experience. Her diverse training regimen keeps workouts fresh.



After having her first child, Marni began training with another new mom she befriended at her local gym. Their daily workouts helped them both stay motivated and attain their goals together. Their positive results inspired Marni to pursue a career in fitness with the goal of bringing that feeling of success to all walks of life.



In 2008, after earning her certification from ISSA, Marni started “Fitness with Marni”, launching her professional career. In the ensuing years, additional certifications in prenatal/post-partum exercise design, static and assisted stretching, and sports nutrition followed suit.

A passion for an active lifestyle of yoga, swimming, family bike rides, paddle boarding, and running with friends has kept her own fitness levels high and makes Marni an ideal role model for her clients.