strenuous

Adjective Satellite

• characterized by or performed with much energy or force
  • "strenuous exercise"
• taxing to the utmost; testing powers of endurance; ; ; - F.D.Roosevelt
  • "a strenuous task"

Adj

• Having great vigour or energy; forceful.
• Requiring great exertion; very laborious.

Examples

• strenuous activity
• strenuous exercise

Synonyms

arduous, straining, ardent, determined, eager, earnest, energetic, resolute, vigorous, zealous

Related Words

strenuity, strenuosity