The inquest into the death of Corporal James Dunsby heard that he suffered multiple organ failure after collapsing during a training exercise on one of the hottest days of the year.
Cpl Dunsby was one of six soldiers who collapsed during the exercise, on July 13, the court heard.
It is thought that the reservists were taking part in an exercise known as the "Fan Dance" which involves marching up South Wales's highest mountain, Pen Y Fan, and down the other side carrying a weighted pack and rifle, then doing the same route in reverse, in a set time.
More top news
Two other men missing on Scotland's hills this winter have yet to be found.
The decision was made after two Russian athletes failed drugs tests at the PyeongChang Games.
Sunday will be dry and largely sunny, although there will be some patchy cloud, mainly across eastern Scotland and eastern England.