On her return to the U.S. she experimented with various exercise techniques, using her early ballet training to develop Callanetics, the program which finally solved and relieved her physical problems. Expanding on her success with her own back issues, Callan went on to teach her revolutionary exercise program from her New York apartment, first to those with similar back issues and then included others who simply loved the body transformation from doing Callanetics exercises. Callan’s success led to book offers, consumer DVDs and teacher training, leading into a global launch of Callanetics. She gained international recognition for the results users claimed from exercising with her program and was featured on national talk shows such as Oprah, Regis & Kathie Lee and in numerous well-known publications such as Shape Magazine, newspaper articles etc. Callan continued to teach, which she discovered was her niche and her love. Over the years, she had many famous and distinguished clients worldwide, all of whom testify that Callanetics is a unique, safe exercise system for transforming your body and your life!