** Shares of Viva Leisure rise as much as 5.3% to A$1.4325
** Stock posts largest intraday pct gain since Nov. 5
** Health and fitness club provider says its unit Plus Fitness International has executed an area development agreement in Singapore
** Agreement to secure additional franchise groups and expand coverage in Southeast Asia
** Unit has sold a franchise comprising five locations in Singapore
** Co says agreements in Malaysia and the Philippines are expected to be finalised shortly
** Viva down 6.1% YTD as of 0307 GMT
(Reporting by Nikita Maria Jino in Bengaluru)
((Nikita.Jino@thomsonreuters.com;))