Short-term high-altitude pre-exposure improves neurobehavioral ability.

Area of Science:

• Human physiology
• Environmental medicine
• Neuroscience

Background:

• High-altitude (HA) exposure affects neurobehavioral parameters.
• The impact of pre-exposure duration on acclimatization is not fully understood.

Purpose of the Study:

• To evaluate the effect of short-term (4-day) versus long-term (3-month) high-altitude pre-exposure on neurobehavioral parameters.
• To compare cognitive performance, mood states, and acute mountain sickness incidence between pre-exposure groups.

Main Methods:

• 111 healthy adults (18-35 years) were divided into short-term (4-day) and long-term (3-month) pre-exposure groups at 3700m.
• Participants were then moved to 4400m, with neurobehavioral assessments conducted at both altitudes.
• Neurobehavioral parameters included mood, cognitive function (sensorimotor, attention, psychomotor), and acute mountain sickness.

Main Results:

• The short-term pre-exposure group exhibited significantly lower negative mood states compared to the long-term group.
• Cognitive performance, including sensorimotor, attention, and psychomotor abilities, was better in the short-term group.
• The short-term group experienced less acute mountain sickness at 4400m.

Conclusions:

• Four-day high-altitude pre-exposure at 3700m is more effective than 3-month pre-exposure for improving neurobehavioral parameters.
• Short-term pre-exposure enhances mood, cognitive function, and reduces acute mountain sickness upon arrival at a higher altitude (4400m).