I don't agree with how they define "conservative" but you get what they mean. Those who are stronger are more likely to be opposed to wealth redistribution, those who are weaker are more likely to support wealth redistribution.
UK Daily Mail - Men who are physically strong are more likely to have right wing political views
Weaker men more likely to support welfare state and wealth redistribution
Link may reflect psychological traits that evolved in our ancestors
Strength was a proxy for ability to defend or acquire resources
There is no link between women's physical strength and political views
UK Telegraph - Stronger men are more right wing
Strong men are more likely to be right-wing while weedier specimens tend to have more liberal view, a study suggests.
Of course this does explain many of the arguments that have taken place in the Symposium over the years.