This may occur if: 1  You have a sudden drop in blood pressure. 2  Your body does not have enough water (is dehydrated) because of vomiting, diarrhea, fever, and other conditions. 3  You get up too quickly after sitting or lying down (this is more common in older people).
Wimbledon 2015: Rafael Nadalâs coach says itâs good to talk during play. Toni Nadal feels that coaches are getting a rough deal. Toni Nadal, the coach and uncle of Rafael Nadal, believes it is impossible for a coach not to encourage and communicate generally with a player during a match.
CeeLo Green of Gnarls Barkley and Adam Levine of Maroon 5 became the first confirmed coaches in February 2011, followed by Christina Aguilera and Blake Shelton in March. Aguilera and Green did not return for season four and were replaced by Shakira and Usher as substitute coaches.