I cant believe I spent 3 years at the gym, 2 hours 5x a week, running on eliptical machine at average 170 heartrate.. and it took me 3 years to cut 20 lbs !
just 6 months ago, I quit the gym, I started doing free weights and workouts like p90x (plus various workouts on youtube) and I lost 20lbs in 6 months..!
moral is.. if you are finding running or working out enjoyable or "Easy" .. STOP and do somethign challenging, we need to constantly challenge our body to lose weight.