[beatgammit]

There are a lot of benefits to lifting small amounts, just look at the huge number of physical trainers who add small weights to aerobic exercise routines, or runners who add ankle weights, etc. There is a ton of material out there for why it's beneficial that I won't bother getting into it all. Using small weights will add measurable difficulty to your workout, which is great if you start to plateau.

That being said, it's not the most effective way to achieve certain desirable results, like optional strength or muscle mass gain. However, OP wants to lose weight in a healthy way and has a health condition that should be taken into account, and adding small weights to an aerobic exercise program is a fantastic way to increase calorie burn and build a little strength at the same time.