4 . Dr. Jon Walz tells all his weight - loss patients to keep their diet plans secret . He says telling people your plans can have a detrimental effect . Time is key , fitness magazine says , but you have to choose your guides carefully .
Dr. Jon Walz tells all his weight - loss patients to keep their diet plans secret . He says telling people your plans can have a detrimental effect . Time is key , fitness magazine says , but you have to choose your guides carefully .