Nigel Benn's offspring.

[Sklar]

I take your point but it's far more sport specific than a lot of the stuff I see fighters doing in gyms e.g. kettlebell swings, rope climbing, etc... Not saying either or is 'wrong' just that you can do some fairly good conditioning drills that are not technically sound. Nigel himself used to do padwork with Jimmy T that was far from textbook. There's an argument that bad habits could form but to me it depends just how much of it you're doing.