Many people are particularly susceptible to back pain when traveling to the Tibetan Plateau. Which of the following statements is correct?

The correct thing is that the main source of energy required by the body at this time is aerobic respiration.

Tourists arriving at plateau areas will experience backache and leg pain due to the anaerobic respiration of some tissue cells in a short period of time. This is caused by the thin oxygen in plateau areas, but at this time the body needs less energy. The main source is still aerobic respiration.