Britt Hertz competes in an extreme couples yoga challenge with Capron and Rydel.

Britt Hertz joins the Rybka Twins to see who can perform the most difficult partner yoga poses.

A yoga challenge was, admittedly, not too intimidating for me. While my commitment waxes and wanes, I tend to get in at least one hour-long vinyasa class a week, and am clear on the benefits of making ...