The Ataniks were an ancient race whose existence and demise predate the Goa'uld. They were the creators of unique armbands, long thought to be a myth, which give the wearer incredible speed and strength. However the body's immune system eventually rejects the armbands, and they will work for only a limited time. Once immunity spread among the ranks of the Atanik warriors, the armbands became useless. The Ataniks were unable to correct the problem, which made them vulnerable and led to the extinction of their race.
Cross Reference: Armbands
Episode Reference: Upgrades