The next installment in the series is a fairly lengthy clip - about 8 minutes - but, if you're interested in this debate, it's very much worth the watch.

It's American football vs. rugby from a scientific perspective, and measures tackles from both a rugby player and a padded American football player.

The conclusion they come to is certainly interesting, but we're not sure that we entirely agree. Watch it through (it's not until the final few seconds that they actually make the comparison, so skip to the end if you're really impatient), and then think about this:

Would you prefer less poundage in the tackle, and a broken rib? Or more poundage, but dispersed so that your ribs stay intact?

And, would you prefer 20 broken ribs from 20 tackles during a game? Or about 10 tackles during a game, where none of your ribs break?

You'll have to watch the whole clip to know what we mean by this.

And, before we leave you to it, there's one more point:

For the experiment, they use an American football player and a rugby player who are both from America. What would change if the experiment was staged with an American football player from New Zealand, and a New Zealand rugby player?

Just a thought.