I injured my back once because my form sucked while I was lifting, nothing major though. I go into work and get asked by a fatty why I'm wincing when I bend down to pick things up so I say why and all I got in response was "see! this is why I don't exercise, you can get injured!". I wanted to scream. You don't avoid going outside because you could get hurt. You don't stop breathing because you could inhale something bad for you. Any excuse with these fats because hard work is too hard.