There are many reasons why you might experience dizziness or vertigo while jumping on a trampoline. The majority of cases are caused by an imbalance in the inner ear, which is responsible for balance and equilibrium. If you have an inner ear infection, your body may be trying to fight off the infection with all its strength. If you have been experiencing problems like this for a long time, your inner ear has likely become damaged from being constantly impacted. This damage leads to problems with your balance and spatial awareness, which can cause dizziness.