"One of the ways to reduce shaking and anxiety is through breathing techniques," says Dr Nnatu. "Deep breathing helps to activate the parasympathetic nervous system and induce a state of calmness." He also points to progressive muscular relaxation, combined with deep breathing, as an effective technique. In progressive muscular relaxation you follow a script like this and tense muscles as you breathe in before relaxing them as you breathe out. Mindfulness and increased movement can help, too – mindfulness to calm a wracked, anxious brain, and running or brisk walking to use up your excess energy and help dissipate the adrenaline.