Since I started working out again after taking it fairly easy for a couple of years, some old problems have resurfaced, including costo chondritis (inflamed cartilage where ribs attach to sternum) and tendinits (especially right shoulder). I'd like to increase strength with some heavier weights, but as I try to do so, these problems recur. Mainly I run, but I need to do some lifting, too. Anyway, I'm new here, and these concerns are how I found the site, so if you want to make suggestions, fire away.