Complex sentence: As Hypermobility Syndrome can be easily mistaken for being double-jointed or categorized as nothing more than perhaps an achy body from lack of exercise, medical professionals can sometimes still diagnose those affected incorrectly.
Split into simpler sentences: As Hypermobility Syndrome can be easily mistaken for being double-jointed or categorized as nothing more than perhaps an achy body from lack of exercise. Medical professionals can sometimes still diagnose those affected incorrectly.