Complex sentence: The band was on shaky ground when Wilson went on a mountain climbing expedition in 2010: he sustained a fall and back injury, and wrote many of the songs that would become a part of Glowing Mouth while bed ridden.
Split into simpler sentences: The band was on shaky ground when Wilson went on a mountain climbing expedition in 2010. After sustaining a fall and back injury he wrote many of the songs that would become a part of Glowing Mouth; while bed ridden.