How does resistance training support the immune system?

Makes you healthy. Wards off metagrbolic syndrome. But will directly improve immunity, but there is a bimodal issue with exercise and immunity. If you run a marathon, you are four times as likely to develop a cold in the next two weeks. Very intense activity suppresses the immune sytem. On the other hand if you take a graded resistance program and don't pusch "too" hard, your immune system will be in better shape!