Starwood Hotels and Resorts Worldwide has announced that two of its brands - Sheraton and Westin - are to expand their portfolios of hotel spas across Asia and the Middle East.

The operator confirmed that Sheraton is expected to increase its spa portfolio by 50 per cent with 10 openings this year, while Westin will add six new facilities over the course of 2011.

Both brands will roll-out in-house, signature spa concepts - Shine (Sheraton) and Heavenly (Westin) at new and existing properties, with a primary focus on the Asian market.

Sheraton Yantai Golden Beach Resort - due to open in October; Sheraton Guangzhou Hotel; and Sheraton Beijing Dongcheng Hotel are among those to host a Shine Spa.

Shine Spas are also earmarked to open at Sheraton Qingyuan Resort - opening in November - and five other sites across Asia, as well as at the Sheraton Baku Airport Hotel, Azerbaijan.

Meanwhile, Heavenly Spa by Westin will launch at The Westin Abu Dhabi Golf Resort and Spa and four properties in China, including The Westin Wuhan Wuchang.

Shine Spa first debuted in 2010 and aim to offer 'approachable' experiences for leisure and business travellers, using colours and materials for a "playful, yet upscale environment".

Meanwhile, the Heavenly Spa by Westin is based around the brand's core beliefs - helping guests leave feeling better than when they arrive and preserving wellness on the road.

Jeremy McCarthy, director of global spa development and operations at Starwood, said: "We continue to bring our hotel brands to life through specially designed and curated brand experiences.

"The concepts are extensions of the individual brand philosophies and the success of our signature, branded spa experiences is driving demand for continued expansion - especially in key global emerging markets."

Image: Sheraton is planning 10 new spa openings in the coming year