Robin Bylenga, 52, the founder and owner of Pedal Chic in Greenville, S.C., is the epitome of a smart, successful female entrepreneur. Before opening her women’s cycling and athletic boutique in 2010,…

Nearly three of every five working retirees see retirement as a chance to shift gears into a different line of work, according to a 2014 Merrill Lynch study. Thirty-seven percent…