Strenuous is an adjective. Strenuous means requiring or using great exertion.
it depends on how you define strenuous. swimming is much better for your joints, as well, swimming probably uses more musles than running, as it is a whole body exercise. when swimming, you are forced to hold your breath, which exercises yor lungs and therefore the rest of your body much more than if you were running. there is also much more resistance when swimming (because of the water) making if much harder to swim a distance (ie.400m) than it would be to run it. (the world record time for 400m freestyle is 3:40.7, whereas, in track, it's 00:43.19 so obviosly, its alot more difficult to swim.)
Strenuous exercise makes me tired.
Strenuous exercise is good for your heart.
The base word of "strenuous" is "strength."
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.
Some of the days are quite long, and the walking feels more strenuous at altitude.