A 1.5-mile run. Forty sit-ups. Thirty pushups in a row. And as many strict pull-ups as possible. Hundreds of people completed this workout, which resembles the Los Angeles Police Department’s physical fitness exam, Saturday morning at CrossFit SCV as a tribute to Miriam Alvarado.  A mother of four, LAPD officer and Santa Clarita resident, Alvarado had been a member of the gym since 2015. CrossFit SCV held a fundraiser for Alvarado in 2016 when