Complex sentence: Seth was recommended by his doctors to not ride his bike for at least six months however Seth ignored this and 4 weeks later he broke the overall indoor world record with a 170 feet jump at the Los Angeles Coliseum.
Split into simpler sentences: Seth was recommended by his doctors to not ride his bike for at least six months. However, Seth ignored this and four weeks later, he broke the overall indoor world record with a 170 feet jump at the Los Angeles Coliseum.