When you're ready and motivated to work out, stopping to stretch and warm up first can feel like a total drag. However, skipping this vital step is setting you up for injury later down the road. Working out on cold muscles and joints is never fun, but with age, we are even more prone to wear and tear, a problem enhanced by failing to warm up. We also take a lot longer to recover from injury, so unless you want to be out of action for 3 weeks with a sprained ankle, start making it part of your regular routine!