Difference between Rigorous and Vigorous

What is the difference between Rigorous and Vigorous?

Rigorous as an adjective is manifesting, exercising, or favoring rigor; allowing no abatement or mitigation; scrupulously accurate; exact; strict; severe; relentless; as, a rigorous officer of justice; a rigorous execution of law; a rigorous definition or demonstration. while Vigorous as an adjective is physically strong and active.

We hope you now know whether to use Rigorous or Vigorous in your sentence.