At age 94 fitness guru Jack LaLanne shows no signs of slowing down. He was in New York City last month promoting his new book, “Fiscal Fitness: 8 Steps to Wealth & Health from America’s Leaders in Fitness and Finance.” LaLanne co-wrote the book with financial expert Matthew J. Rettick. LaLanne and Rettick sat down with Senior Market Advisor editor Daniel D. Williams to discuss how seniors can best upgrade their physical and fiscal health.