so what would you define as low tension and high tension?
For me, the middle would be 55. Low would be below that, so like for example, Dementieva's 50 would be low. And high would be above that. But from the 50-60 range is what is probably average. I like my racquets strung pretty low, and usually at 50, but sometimes, I can play with ones in the 30s. Thats VERY extreme though.