With marathon season around the corner, runners are one group of athletes using online resources to aid offline performance. Training to run a marathon is easier than ever with a host of tools — from apps that record nutritional needs to online shopping for the best new sports gear to virtual support networks, from Twitter chats to online running communities.

Personally, I am training for my first half-marathon, taking place in Toronto on May 15. Online marathon tools are proving vital to my training. This week’s Friday Five includes…

Staying connected has never been easier. See something cool? Post the link on Facebook. Going out for dinner? Don’t forget to check-in on Foursquare! Social media enables our global connectivity, but rarely do we ask ourselves the fundamental question “Where can the information we post end up?” Below are just five examples of how information we might casually post could go much further than we think.

WeFeelFine

This website “harvests” human emotions by searching newly posted…