I fell off the exercise wagon with a resounding "thud" about two years ago when I tore my ACL during a karate class. I finally feel strong enough to get back on track with a normal exercise routine, but I'm starting from square one and confidence is in short supply. I'm hoping that if I post on this forum, it will help me to stay on track. How do the threads in the Check-ins and Challenges section work? Do I need to start my own thread? Can I join an already existing thread? My initial goals are to decrease fat and increase cardio and muscular endurance. Thanks in advance for your replies!