A Northeast Senior Health Lecture on "Biomechanics: Saving Your Back While Gardening and Cleaning," will be held May 7, from 10:30 to 11:30 a.m. at the Danvers Senior Center, with Kimberly Wilder, occupational therapist with Ledgewood Nursing and Rehabilitation Center. Free lecture, no pre-registration required. For information or directions, call 978-762-0208.