Inikeza indawo yokugcina ama-dumbbell okuqeqesha isisindo mahhala ekuqeqeshweni okuphambene, isikhala sama-2-Tier sama-pair ayi-10 ama-dumbbell angu-20 anezisindo ezijwayelekile, kanye nesikhala esengeziwe phezulu sivumela ukugcinwa kwezesekeli ezisizayo njengamabhola okuqina, amabhola emithi, njll. Ngenxa yochungechunge olunamandla lokuhlinzeka kanye nokukhiqiza lwe-DHZ, isakhiwo sohlaka lwemishini sihlala isikhathi eside futhi sinewaranti yeminyaka emihlanu.
