Yet Another Problem For Fructose

Study on exercise recovery.  Conclusion of abstract:

CONCLUSIONS:

Mixed meals containing fat, protein, and either fructose or glucose elicit similar repletion of IMCLs and muscle glycogen. Under such conditions, fructose lowers whole-body glycogen synthesis and impairs subsequent exercise performance, presumably because of lower hepatic glycogen stores. This trial was registered at clinicaltrials.gov as NCT01866215.

Therefore, by interfering with glycogen synthesis, fructose "impairs subsequent exercise performance" - something that both professional athletes and the amateur person trying to keep in shape want to avoid at all costs.

Avoid exogenous fructose (that is, fructose not naturally found in healthy food like fruit) as much as possible.