Since 1985, Tallmadge-based NZ Manufacturing has made USA-made resistance cords and bands for swim training, rehabilitation and athletic conditioning. Its StrechCordz line was developed by competitive swimmers and is used by everyone from novice swimmers to Olympians, while MediCordz and TurfCordz extend the company’s engineered resistance tools into clinics and high-level sports training. The company’s proprietary safety-cord designs and interchangeable resistance systems are built for demanding use in pools, clinics and training facilities.