The phrase "a considerable exercise" is correct and usable in written English.
It can be used to describe an activity or task that requires significant effort or resources.
Example: "Completing the project on time was a considerable exercise in teamwork and coordination."
Alternatives: "a significant undertaking" or "a substantial effort".
The term 'sedentary behaviour' is open to uncertainty, as considerable exercise may be taking place in a sedentary (i.e., seated) position for example, rowing or cycling.
A day at Sage Hill may read like a traditional spa experience -- reduced-carb meals ("I'm an intuitive cook; I don't make food for how it will taste but for how it will make you feel"), considerable exercise (you get up at 6 and take a six-mile hike every day), every massage and alignment you've ever heard of, even acupuncture, and in-depth counseling (but no mud baths, no facials, no pedicures).
The Australian Cattle Dog is an adaptable dog that can accept city or indoor living conditions, if its considerable exercise and companionship needs are met.
Alongside this, some form of conscious control over energy intake must be considered because the reality for many is that a considerable volume of exercise is required to significantly reduce body fat.
The RFU has agreed a central management system for the leading players with the Guinness Premiership clubs, who will receive £11m a year for allowing the Union's elite rugby director, Rob Andrew, to exercise a considerable amount of control over the national squad.
Even without possessing powers beyond those explicitly assigned to it, the Nocturnal Council should exercise a considerable influence on Magnesia's governance.
Former Conservative leader Lord Howard has urged MPs to exercise "a considerable degree of self discipline", particularly in the run-up to a planned referendum on the UK's membership of the European Union in 2017.
[Site J mental health trust manager] GPs and other primary care staff, at all of the sites we visited, were able to exercise a considerable amount of discretion as to whether they engaged in clinical governance activities that related to mental health or not.
During his lifetime he exercised a considerable influence on European taste.
Kepler's causal approach is above all present in his Epitome, a voluminous work which exercised a considerable influence on the later development of astronomy.
