One trend seems to be towards treatments for men and couples. The Emerald Princess has couples rituals with full body massages and/or exotic bathing rituals. Men's treatments include massages, facials, and special shaves.
The Emerald Princess fitness center offers cruisers the opportunity to maintain (or improve) their fitness level when at sea. The gym overlooks the front of the ship, and you get a great seaview when walking on the treadmill. The fitness center has several free classes each day and specialized classes in yoga, pilates, and spinning, which have a fee.
One new feature in the Lotus Spa is the Lotus Thermal Sanctuary Suite, which includes thermal grottos, aromatic steam chambers, sauna suites, and heated stone benches. Passes to this thermal suite are sold for the entire cruise.