The development of the term 'open-air recreation' has been a long one but it has always been associated with improving access to the outdoors. Here's a few;
House of Commons debate of 1843 on the Inclosures Bill.
Mr Muntz ?agreed that nothing was more wanted in manufacturing towns than places of recreation for the inhabitants, and that no greater boon could be given to the working-classes than that of providing such places. The want of places of recreation in the open air drove many of the inhabitants to the public-house, where almost necessarily they became drunkards.?
In the same debate the term ?exercise and recreation? are used.
Mr Stanton ?That in every bill for enclosing lands provision be made for reserving a portion of the land to be enclosed to be let in allotments, not exceeding a quarter of an acre each, to the labouring population of the district, and for leaving an open space in the most appropriate situation, sufficient for purposes of exercise and recreation of the neighbouring population;?
Section 193 of the Law of Property Act 1925 states, ?Members of the public shall, subject as hereafter provided, have rights of access for air and exercise to any land which is metropolitan common within the meaning of the Metropolitan Commons Act 1866-1898??
Access to the Mountains Bill.
House of Lords Debate, 06 June 1939. ?Subject to the provisions of this Act, no owner or occupier of, or person having an interest in, land to which this Act applies shall be entitled to exclude any person from entering or being on the land, on any day between one hour before sunrise and one hour after sunset, for the purpose of air and pedestrian exercise so long as he??
National Parks and Access to the Countryside Act 1949, Part 1, Section 1(b). ?For encouraging the provision or improvement, for persons resorting to National Parks, of facilities for enjoyment of the opportunities for open air recreation and the study of nature afforded thereby.?
...and of course...
The Countryside and Rights of Way Act 2000, Part 1, Section 2(1). ?Any person is entitled by virtue of this subsection to enter and remain on any access land for the purposes of open-air recreation, if and so long as-?
It is difficult to assess how much influence the ?open air movement? may have had on this most recent term. This was a strong and influential movement who amongst other things promoted ?open air schools? whose aim was to bring fresh mountain air into the classroom in order to prevent the scourge of diseases such as tuberculosis. The movement was at its height throughout the 1930?s, 40?s and 50?s, during the era when the term 'open-air recreation' was first used in legislation.
None of the terms were ever used in the narrow sense to rule out the inclusion of caving for example.