Faederwulf

https://vatoto.com/comic/_/comics/jojos-bizarre-adventure-part-2-battle-tendency-r5538

Spoiler in comments here by user Plems

The FitnessGram™ Pacer Test is a multistage aerobic capacity test that progressively gets more difficult as it continues. The 20 meter pacer test will begin in 30 seconds. Line up at the start. The running speed starts slowly, but gets faster each minute after you hear this signal. [beep] A single lap should be completed each time you hear this sound. [ding] Remember to run in a straight line, and run as long as possible. The second time you fail to complete a lap before the sound, your test is over. The test will begin on the word start. On your mark, get ready, start.

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"It is no measure of health to be well adjusted to a profoundly sick society." ~ J. Krishnamurti

Actually it facilitates runaway sexual selection, specifically co-evolution of female choice and extreme male morphology.  It's good for making larger horns or brighter plumage, but otherwise often acts orthogonal to selection for vigor, survival or quality offspring.

In humans, selection is (outside of the modern cultural system and other corrupted cultural systems) done by females, and only the best men get to have children. Ordinarily, the strongest and/or most fit to hold a high position in the hierarchy will have the most wives and most children. Of course, in today's world those with a bark louder than their bite succeed at getting women, as do those with a lot of money.

Of course, the polygamous system has the weakness of female hypergamy. The only way this can be avoided in a polygamous system is to teach men to value quality over quantity (not an easy task, libido is difficult to control).