Does anything in the 'alternative medicine' interest you enough to give a speech about it? Research shows that most people use alternative therapies at some point in their lives so that certainly fits the 'new trend' description.

The list is long: meditation, acupuncture, over-the-counter meds, breathing, prayer, spiritualism or religion, exercise, yoga or Tai Chi, dance, massage, healthy eating, support or 12-step groups, animal therapy, the role of support such as friendship, etc, etc.

Best wishes - let us know what you come up with.