ISO Biceps Curl.

Two and a half kilos is a lot on a small muscle.

On a curl machine with a stack the next step is often five kilos, and on the biceps that is a jump of ten percent or more, you get stuck for weeks because the next pin is too heavy and the one you are on is too light. Here you load with plates, so you add 1.25 kg per side on the day that is all you need. The angled elbow pad holds the upper arm firmly against the pad, so nothing can swing along when it gets tough. The machine is 1135 mm high, weighs 101 kg and takes Olympic plates (Ø50 mm). Small steps count too.