It may be true that hustling can help you crush your goals. But sometimes, the “it” you’re crushing in gym classes and workplaces is just, well, you. The next time you crawl out of the weight room or a particularly long day of meetings, be prepared with a tool that targets your tension. Power massagers are portable, can pay for themselves in just a few uses by replacing pricey massage therapy, and can be deployed whenever you want. Here are four heavy-duty standouts to help keep you relaxed and in top form.