Lack of sound sleep can affect your mood, mental alertness, energy level, and physical health.
The caffeine in coffee is a stimulant and may help with mental alertness and fatigue.
Inadequate or poor-quality sleep can negatively affect your mood, mental alertness, energy level, and physical health.
Friends and family were amazed at his robust health and mental alertness until the very last days of his life.
Phil talks brilliantly elsewhere about the unusual combination of mental alertness and absolute lack of attention he experienced in these groups.
Clare Hoods-Truman, associate principal of Oasis Academy Blakenhale Infants in Birmingham, introduced the Fit4Schools programme to increase her pupils' physical health and mental alertness.
To use an extreme example, a company may offer its staff the opportunity to use devices that monitor blood sugar, mental alertness and so on.
The fact is that healthier lifestyles and medical advances mean that we can maintain physical energy and mental alertness for longer.
When ingested in small amounts, cocaine produces feelings of well-being and euphoria along with decreased appetite, relief from fatigue, and increased mental alertness.
More importantly, cocaine when ingested in small amounts produces feelings of well-being and euphoria, along with a decreased appetite, relief from fatigue, and increased mental alertness.
Porton found that the men were distinctly unhappy and depressed afterwards, emotions that were combined with a "feeling of reduced mental alertness and a tendency to social withdrawal".
