Complex sentence: The jump requires a warm-up (stretching), and therefore Momota needs more time to prepare yourself before concerts than other members, and the song "Ikuze Kaito Shojo" can't be performed at any time.
Split into simpler sentences: The jump requires a warm-up (stretching), therefore Momota needs more time to prepare yourself before concerts than other members. Also because of that the song "Ikuze Kaito Shojo" can't be sung at any time.