Malingaliro a kampani PowerBlock, Inc
Dumbbell Yanyumba / Yamalonda, Kettlebell Yosinthika, Barbell, Bench
PowerBlock, Inc. idakhazikitsidwa mu 1991 ndi opanga zida zapadera zolimbitsa thupi omwe adakhala mabwenzi pomwe akupanga zida zamakampani angapo kuphatikiza Parabody ndi Cybex. Pamene ankafufuza zofunikira zenizeni m'makampani ochita masewera olimbitsa thupi, adakopeka ndi ma dumbbell ambiri omwe amakumana nawo m'masitolo apadera omwe amapitako. Panayenera kukhala njira yabwinoko yoperekera okonda zolimbitsa thupi ndi mwayi wochita zolemetsa zamanja popanda malo ndi zoletsa za ma racks akale ndi ma dumbbell. Unali apa lingaliro la PowerBlock lidabadwa. Pambuyo pazaka ziwiri zakuyesa kwakukulu, PowerBlock idayamba kugulitsa "dumbbell" yomwe idangopangidwa kumene. Kuyambira nthawi imeneyo, PowerBlock yakhala ikutsogola pamakampani opanga masewera olimbitsa thupi pomwe timayesetsa kuchita tokha pofunafuna kuchita bwino.