In addition to the usual sit-ups and crunches, there are other effective exercises for the abs. These are "roll" movements that can typically be done with an abdominal wheel.
The double-handled wheel promotes high isolation of the abdominal muscles, which are thus maximally stressed. It is important to "round" the back to fully contract these specific muscle groups (especially the lower back).
The double-handled wheel is a tool that acts as an "abdominal stabilizer." In this exercise, abdominal contraction is also regulated by breathing. This involves inhaling deeply, trying to hold your breath throughout the entire repetition.
