No, we don’t require any medical certificate but if you are not in good health you should NOT jump. It is not advisable for who have heart disease, pregnancy, ophthalmology (severe myopia, degenerative myopia etc.), damages of skeleton, muscles-tendons and joint, shoulder dislocation, central an peripheral neurological disease (paresis, paralysis, epilepsy)subjects under the influence of drugs and alcohol.
Anyhow, we are not medically trained professionals so we cannot comment on individual cases so we always recommend you consult your doctor if you have any concerns about your health.