The phrase "a training area" is correct and usable in written English.
It can be used to refer to a designated space or location where training activities take place, such as in sports, military, or educational contexts.
Example: "The soldiers gathered in a training area to practice their drills and improve their skills."
Alternatives: "a training ground" or "a practice area".
Next, three classification models were calibrated in a training area using different multivariate statistical techniques.
The base has been used as a training area for National Guard troops preparing for President Bush's homeland security effort.
It might not even be capable of carving out a training area in Iraq's Sunni cities or deserts, as it has done in the tribal regions of Pakistan.
There is also a training area designed to help them identify the improvised explosive devices (IEDs) that have been used to such deadly effect by insurgents.
And it has built a training area for signal workers, a nod to the frequency of train delays because of broken track circuits.
A circle of threadbare sofas, sunken love seats and canvas sports chairs surrounded a training area in the former V.F.W. social hall.
In November 2010, six American soldiers were killed by a man wearing a border police uniform at a military training area in Nangarhar, and a year earlier five British soldiers in Helmand Province were killed.
A 16 km2 portion of a military training area in Germany was systematically sampled by plant taxonomic experts on a grid of one hundred 1-ha plots.
The gunmen, in two sport utility vehicles, approached the marines near a military training area and started firing, an embassy spokeswoman said.
Ham can often be found running at Glasgow's Cathkin Braes, a favourite training area for another Gorbals fighter - and a world champion - Benny Lynch, back in the 1930s.
What they did not know was that Canadian infantry troops were conducting an exercise using live ammunition and small arms in a designated training area south of Kandahar.
