[artlogic]

I started indoor climbing 3 months ago and it's done wonders for my grip strength, as well as my overall health. I can't recommend it enough for engineers and other problem solving addicts. I was, frankly, bored by weight training and other more traditional exercise routes. Now I look forward to a nice change of pace - solving physical problems as opposed to logic problems.

[brianmwaters_hn]

The problem-solving aspect of climbing (esp. bouldering) is definitely one of the best parts. Very easy to get sucked "into it" once you get started.

[caconym_]

I second your recommendation. For various reasons I haven't been doing it the last few years, but it was really good for me and I'd like to get back into it.

[nitrogen]

Another non-team sport that has good problem solving aspects but on a faster pace is trail running. You don't get the same thinking through a route you might have with rock climbing, but leaping over rocks and ruts requires some quick subconscious analysis and careful pacing that can be quite exhilarating.