I prefer functional training with my bodyweight rather than isolated exercises on a machine and recently I heard about basic movement patterns. The concept is convincing but there are different definitions of the patterns. Some say there are six, seven or eight basic patterns but others distinguish even between twelve patterns.
Why is this the case? Do all the resources mean the same basic patterns but put them into different number of groups (i.e. seemingly some count rotation and anti rotation as two patterns, whereas others sum them up to one rotation group)? If so: What are those basic patterns, i.e. how can we refer the twelve patterns to the six, seven or eight others name? Or are there such differences because the concept of basic movement patterns is flawed?