Can Vigorous Activity Lead to an Increased Risk of Saline Implant Rupture?

Breast implants are manufactured medical devices and have an intrinsic rupture capacity.  Vigorous exercise will not place them at higher risk of rupture, but blunt trauma and the presence of capsular contracture may increase the risk. 

Both saline and silicone implant are made of very strong materials.  The outer shells are generally very resistant to rupture.  Rarely, there can be a manufacturing defect that leads to an early rupture.  Usually, a rupture occurs when the shell of the implant weakens over time.  This weakening occurs as folds in the implant shell develop.  These folds weaken the shell by affecting the structure of the shell and causing a loss of strength of the material.  Rarely, is a vigorous activity solely responsible for an implant rupture.  It may contribute to a rupture in an older implant that has developed a weakened shell over time.

Prosthetic Breast Implants are soft and feel natural because they are made of pliable materials (silicone shells) filled with isotonic saline solution (salt water). These shells are similar to paperclips, in that, over time, the folds produced by their inherent "naturalness" bend back and forth and will eventual crack and break....breaking the shell allows the saline/salt water to leak into the surrounding tissues and deflates. 

It not typical for "vigorous" activity, such as you spoke of, to cause a rupture, but reports do exist of occurrences such as this and even as seemingly innocent as routine mammograms (operator dependent!). My sense is that the longer your saline implants have been in your body, bending back and forth at the folds like a paperclip, the higher likelihood that they may rupture and the small the magnitude of  the "event" maybe.