Sensor advice - measuring tension

What sensor would be best to use if I wanted to measure when a handbag is being carried? I was considering measuring the tension in the handles, i.e. when it is carried there would be more tension in the handles. Also, the shape of the handles probably would change so perhaps a flex sensor would work.

Any advice? Which sensor would most suitable / durable?

One in this category : - Flex / Force - SparkFun Electronics - I think

An accelerometer would tell if it is moving or stationary without having to fiddle with the handle.