In trying to increase my weight goal, I started to workout.  To walk around the park.  Turns out, all this extra weight on me took it's toll too soon.  I am now hurting.  My knee is hurting.  Which prevents me from continuing to work out.  Which puts me in an uneasy mood lately.  I know it's probably is an excuse to not force myself and It might just be a reflection of how I have been feeling lately.  Whatever it is, it's now allowing me to work out.  What to do?  How do I keep myself motivated to do something else to get this weight off?