Select the most appropriate ANTONYM of the underlined word.

Strenuous exercise can result in muscle pain.

Effortless

The most appropriate antonym of the underlined word "strenuous" is effortless.

• Strenuous: requiring great physical or mental effort.
• Effortless: requiring no effort.
• Irksome: causing annoyance or irritation.
• Impelling: driving or urging on.
• Aggressive: forceful and assertive.