Are more active military service personnel dealing with the effects of joint pain? History says retired military personnel are the biggest sufferers of arthritis as their bodies endure punishing exercises and duty in the field. But Flexcin International, Inc., a maker of natural supplements for joint pain, saw its biggest increase ever in 2009 from active-duty military seeking arthritis relief. Read the full news about a recent study which analyzed the records of more than 34,000 military personnel treated between 2004 and 2007 and found that the majority of injuries were from back, joint and muscle pain.