Heart Math

Speaking of heart rates, here's a website for "Heart Math", a non-profit group that researches heart rates and their effects on health.  They also have a for-profit division, www.heartmath.com, where they sell different products and services.

I came across the Heart Math websites years ago, but I still can't make up my mind about them.  I think their general idea is right, but I just don't know if there's enough evidence to support their claims.  Maybe someone else out there has a better perspective on this organization.