Speaking up matters, but that doesn’t have to be just metaphorical. If you attend a protest, you may find yourself chanting, cheering, shouting, and otherwise using your voice to be heard loud and clear. The fight against injustice is a marathon, though, not a sprint, so you’ll want to be able to shout again another…
Source: LifeHacker – How to Shout at a Protest Without Wrecking Your Voice