Complex sentence: Inglis was a keen sportsman and enjoyed long distance running, walking, mountaineering and sailing; at Cambridge, he nearly achieved a blue for long distance running but was forced to withdraw from a significant race with a pulled muscle.
Split into simpler sentences: Inglis was a keen sportsman and enjoyed long distance running, walking, mountaineering and sailing. At Cambridge, he nearly achieved a blue for long distance running but was forced to withdraw from a significant race because of a pulled muscle.