SANIBEL, Fla.

AT an office party in 2005, one of my colleagues asked my then husband what I did on weekends. She knew me as someone with great intensity and energy. “Does she kayak, go rock climbing and then run a half marathon?” she joked. No, he answered simply, “she sleeps.” And that was true. When I wasn’t catching up on work, I spent my weekends recharging my batteries for the coming week. Work always came first, before my family, friends and marriage — which ended just a few years later.

In recent weeks I have been following with interest the escalating debate about work-life balance and the varying positions of Facebook’s Sheryl Sandberg, Marissa Mayer of Yahoo and the academic Anne-Marie Slaughter, among others. Since I resigned my position as chief financial officer of Lehman Brothers in 2008, amid mounting chaos and a cloud of public humiliation only months before the company went bankrupt, I have had ample time to reflect on the decisions I made in balancing (or failing to balance) my job with the rest of my life. The fact that I call it “the rest of my life” gives you an indication where work stood in the pecking order.

I don’t have children, so it might seem that my story lacks relevance to the work-life balance debate. Like everyone, though, I did have relationships — a spouse, friends and family — and none of them got the best version of me. They got what was left over.

I didn’t start out with the goal of devoting all of myself to my job. It crept in over time. Each year that went by, slight modifications became the new normal. First I spent a half-hour on Sunday organizing my e-mail, to-do list and calendar to make Monday morning easier. Then I was working a few hours on Sunday, then all day. My boundaries slipped away until work was all that was left.