The phrase "alertness when" is correct and usable in written English.
It can be used to describe a state of being attentive or vigilant during a specific situation or event.
Example: "The athlete demonstrated great alertness when competing in the final race."
Alternatives: "vigilance during" or "awareness in".
At the other end Leicester were thankful for Harry Maguire's alertness when a poor clearing header from Danny Simpson fell at the feet of Enda Stevens.
And Hodgson would have noted his superstar's alertness when Steven Gerrard regained possession from a half-cleared corner in the 48th minute and curled in a diagonal cross that took two deflections before bouncing up in front of Rooney, who was waiting on the far post and nodded the ball into the net from a few inches out.
Professor Dai's acknowledgment of Siyu's decision to purchase a secondhand car so that the older woman could avoid taking a crowded bus or enduring a chatty cabdriver was hinted at but not directly stated, and so was her gratitude for Siyu's alertness, when she had failed to answer Siyu's weekly phone call and Siyu had discovered the older woman on the floor by the piano, having suffered a stroke.
They found that the concentration of adenosine rises steadily during periods of alertness, when the brain uses the most energy, and drops during naps or deep sleep.
Other studies have shown that our low point in alertness, when melatonin production is shutting off in the morning, tends to occur about 2 hours after awakening.
Kelley and Gorham argued that enthusiastic nonverbal cues induce higher emotional arousal in learners, which in turn, led to higher cognitive activation and alertness when focusing and recalling information.
On the other hand, the present data reinforces the importance of compliance to infection control measures and clinical alertness, especially when inter-hospital transferal of patients is involved, in preventing major outbreaks of VRE infection.
It has been shown that sleep quality and alertness improved when workers spent their day in an office with blue-enriched white light with an intensity of 310.35 lux in the daytime instead of in the standard white (4000 °K) office lighting conditions with a mean intensity of 421.07 lux [ 29].
Studies have shown that caffeine can enhance mental alertness, and, when combined with carbohydrates, can help muscles retain glycogen.
With the early evening peak of alertness occurring precisely when a vast majority of workers are wrestling with motorways or public transport on their commute home, what if that commute were simply eliminated?
We have successfully tested it with hundreds of people both in controlled tests and in real world scenarios for improving focus and alertness, staying calm when nervous, for cadence while running and to wind down before going to sleep," he says.
