Soldiers are examined after exercise (drill) to check how fit they are.
War Office scientists have decided to test "how much the modern soldier can endure" and placed a group of soldiers under 'health investigation'. A soldier is seen with his shirt unbuttoned and wires placed on his body. This device measures body temperature, heart beat rate and the rate of breathing, informs a voiceover. Soldier is also fitted with a strange looking gas mask, a helmet, rucksack with his belongings and a gun. He joins a group of soldiers, all looking same as him, and they start running.
Soldiers run across the field, climb the stairs, run downhill, across a high barricade (more like a jump), crawl under the wire, run across the water - classic army training scenes. At the end, a team of scientists (three men wearing civilian clothes) waits for them to measure how fit they are. One of the scientists holds a soldier's wrist, measuring his pulse. Another soldier is seen with special mask measuring the amount of air he breathed.
While the two soldiers are examined, the other two are marching in circles in the background - "in order not to lose the effects of their training". Several shots of strange machines the scientists use to collect health data necessary for their research. Machines are attached to soldiers and data collected can be analysed after the exercise.