** Shares of Viva Leisure VVA.AX rise as much as 12% to A$1.59, their highest level since April 30
** On track to mark its steepest intraday pct rise since January 30
** Health club operator upgrades FY26 underlying net profit after tax guidance to over A$17 million ($12.18 million) from previously guided A$16 million
** Reaffirms previous revenue, statutory EBITDA, and underlying EBITDA guidance for FY26
** Down ~7% YTD, including the session's moves
($1 = 1.3953 Australian dollars)
(Reporting by Anjali Singh in Bengaluru)
((anjali.singh2@thomsonreuters.com; ))