"strenuous problem" is correct and usable in written English.
You can use it to refer to a situation or task that requires a lot of effort to complete. For example: "The research project was a very strenuous problem to tackle."
It's not a strenuous job.
"But it's a very strenuous job".
It's a strenuous job that can build a great physique if you're already in good shape but can damage any body suffering from existing problems.
Numerical results for these strenuous test problems provide evidence for the algorithm's improved solution quality and accuracy.
It measures 8 different domains: Pain, problems with light physical activities, problems with more strenuous physical activities, problems doing your job, reduced energy and strength, low spirit, reduced social life and sleeping problems.
Patients were asked to score the eight domains of the DOLOtest (1 to 100 on a visual analogue scale): pain, problems with light physical activities, problems with more strenuous physical activities, problems doing your job, reduced energy and strength, low spirit, reduced social life, and sleeping problems.
An autopsy revealed that Abram died from complications associated with sickle-cell trait, which can lead to severe problems after strenuous exercise.
The most common exacerbating events acknowledged were mental stressors, weather changes, sleeping problems and strenuous activity (Table 4).
The main reason for this is that the sensitivity of the Lysholm scale in detecting functional limitations in patients with ACL injury, compared with other diagnostic groups, has been questioned (and may therefore have limited validity) [ 28], but also because the Lysholm scale has been reported to not accurately identify problems during strenuous activities [ 15].
"On occasions where levels are high, adults and children with lung problems, and adults with heart problems, should reduce strenuous physical exertion, particularly outdoors, and particularly if they experience symptoms," he said.
