Is there difference between 'weight excess' 'excess weight'?

Hi, everybody, what are the differences between "weight excess" and "excess weight"? I mean, is there difference in meaning"?

For example: "Excess weight increases the risk of health problems such as..." Might I write as follows "weight excess increases the risk..."?
Other example: "Weight excess has been correlated with X, Y..." or "Excess weight has been correlated with X, Y..."?

Thanks.