The phrase "a rigorous discipline" is correct and usable in written English.
It can be used to describe a field of study or practice that requires strict adherence to rules, methods, or standards.
Example: "Mathematics is often considered a rigorous discipline due to its reliance on precise definitions and logical reasoning."
Alternatives: "a strict field" or "a demanding area of study".
Limiting himself to a single lens, he says, imposes a rigorous discipline.
At the Cornish School Bird's classes introduced him to modern dance as a rigorous discipline.
Develop a rigorous discipline for identifying, evaluating, and responding to ambiguous threats.
It is the exercise of a rigorous discipline of thought that animates the university.
To incentivise them to adopt a rigorous discipline, computer science GCSEs must be added to the English baccalaureate.
Corruption analysis has become a rigorous discipline with a broad consensus on what corruption is and a range of indicative case study analyses.
Though his approach is no longer widely endorsed, it had great influence on subsequent art historians and helped establish art history as an intellectually rigorous discipline of modern scholarship.
In journalism, a much more rigorous discipline than comedy, two is but a fluke, but the third time something happens, it is a trend.
Most of the dancers, who consider themselves a big family but come from all over, had trained together with Ms. Weary since they were toddlers, recipients of what they call Ms. Weary's "daily medicine," a combination of rigorous discipline and practice of the language of ballet.
This passage alludes to the results of a pattern of rigorous discipline that informs many "performing arts" (which would include the tea ceremony and calligraphy as well as theater) in Japan, as well as East-Asian martial arts.
" 'What's a Temple guy doing celebrating?' " It is a testament to the rigorous discipline of McKie's game that a simple gesture of triumph would be considered wholly out of character, resulting in a jangling of the telephone and his college coach's nerves.
