25 Probable Reasons You are not able to lose the weight
You do only cardio workout: While cardio is good, weight training is something that you should not miss out on. Weight training helps in building muscle and revving the rate of metabolism which can help speed up weight loss.
You work out on an empty tummy: If you keep working out with an empty belly then the calories that you expend are from muscle and not from fat. Losing muscle can only be slow down the weight loss, so do consider eating something before working out.
Your spouse is not into healthy living: Having a partner for your fitness program helps a lot as both of your practice the same healthy lifestyle. But if one of you is gorging on junk foods or not encouraging you to work out, then this can hinder your fitness goals.