5S Leg HIIT Routine – Do 10-20 Rep’s of Each Exercise – Back to Back! By Jason Curtis|2024-02-23T09:34:44+00:00February 23rd, 2016|Categories: Articles|Comments Off on 5S Leg HIIT Routine – Do 10-20 Rep’s of Each Exercise – Back to Back! Share This Story, Choose Your Platform! FacebookXTumblrPinterest