* testing powers of endurance
low key, subdued, non strenuous.
Could be growing pains or you did some strenuous activity with them.
Strenuous is an adjective. Strenuous means requiring or using great exertion.
Strenuous exercise makes me tired.
temporary oxygen shortage in cells resulting from strenuous exercise
Strenuous exercise is good for your heart.
The workout was quite strenuous.
Strenuous describes hard and extended physical exertion or exercise.
The strenuous exercise made my muscles ache.
Too much strenuous exercise can result in jury.
He lifted the boulder, but not without heavy exertion.you can not win without exertion . Your highest exertion is required.
Building the house was a strenuous job, but John's love of hard work showed through.