Retired Nurse, widowed for one year, after caring for quadriplegic husband for 16yrs.  Over 60. I don't eat regularly.  I have a "bad" knee.  I do yoga at a fitness center twice a week.  I need to lose 40-50 lbs.  I have recently started dating and now have more incentive to get in shape.  I am also concerned about the affect my weight has on my joints, especially my knees.  I am not well self disciplined.  I start out great, but my follow through is poor.  I love fruits and veggies.  Not a big meat eater.