Rather than passively forcing our muscles into painful, temporary and ineffective lengthening which can (in some cases) reduce your performance it's generally advisable to take your muscles and joints through a dynamic warm up to prep the body. And even if static stretching is part of your program it's still a good idea to perform a dynamic warm up before a cardio or resistance training workout (especially for those who work all day at a desk, in a car or regularly use computers and mobile devices). Here are two of my favorite dynamic warm ups that I give clients to do before workouts and even throughout the day at work or on rest days.