The sympathetic nervous system, which helps your heart and other vital organs function all the time, increases activity in response to danger or stress, preparing the body for extra demands. Stress is ...

Each part of the nervous system uses internal checks and balances to regulate its activity, responding to various factors like mood, health status, and the external environment.¹ These regulatory ...

(CNN) — Many people approach fitness with the same assumption: If they just train harder, stay consistent and push through discomfort, results will follow. But for countless exercisers, effort isn’t ...