(Image credit: Getty Images) If you suffer from upper-body tension and stiff shoulders, I am right there with you. As a trainer, I spend a lot of time either exercising or teaching others how to do so safely, and, because of that, I have developed bulletproof shoulder mobility routines I trust. And they work. This routine is one of those: a tried and tested four-move mobility series you can move through at your own pace, in your own time. It relieves upper-body tension, boosts mobility, relieves tight shoulders and can help you improve strength, too. Article continues below Watch: 4-move shoulder mobility routine Exercise 1: "Flow" combo 3 rounds Exercise 2: Bird dog x 6-8 reps per side Exercise 3: Internal and external shoulder rotation combo x 15-30 seconds Exercise 4: Shoulder dislocations x 20 reps The routine starts with a short flow, which means a sequence of downward dog, plank, kneeling push-up, upward dog, back to downward dog.…