Research subjects sought The American Cancer Society is seeking Fairfax County residents, ages 30-65, with no history of cancer, to enroll in the Cancer Prevention Study-3. Identities of subjects are anonymous. Participants have their blood taken and their waist circumference measured and answer a questionnaire. 888-604-5888. Appointments are available on:

●Saturday, 9 a.m.-1 p.m., and Oct. 2, 4-8 p.m., nZone, 145500 Lee Rd., Chantilly.

●Tuesday, 4-8 p.m., Health Department (Mount Vernon), 8350 Richmond Hwy., Alexandria.

●Sept. 25, 4-8 p.m., Vienna Community Center, 120 Cherry St. SE, Vienna.

●Sept. 26, 8 a.m.-noon, Fairfax City Department of Health, 10777 Main St., Fairfax.

●Sept. 28, 10 a.m.-1 p.m., Burke Presbyterian Church, 5690 Oak Leather Dr., Burke.

●Oct. 2, 3-7 p.m., Reston Hospital, 1850 Town Center Dr., Reston.

Tai chi beginners practice Gentle outdoor exercise. Saturday, 8-9 a.m. McLean Central Park (outdoor basketball court behind the library), 1468 Dolley Madison Blvd., McLean. 703-759-9141. Free.

Springfield myasthenia gravis walk Raise funds for research of the chronic autoimmune neuromuscular disorder. Choose a one- or three-mile route. Saturday, 9 a.m. Lake Accotink Park, 7500 Accotink Park Rd., Springfield. 855-649-2557.

Reston SUSCO 8K The run and 2K fun walk will benefit the Brain Aneurysm Foundation and Washington Regional Transplant Community. Run on streets in Reston. Saturday, 9 a.m. South Lakes High School, 11400 South Lakes Dr. 703-742-0582. 8K, $40; in advance, $35; 2K, $25.

“ADHD in Adolescents: The Parenting Perspective” A workshop on parenting teenagers with ADHD. Saturday, 9:30 a.m. ADHD Resource Group of Northern Virginia, training room, 4031 University Dr., Fairfax. 571-405-3051. $30 per family or couple, registration required.

National Falls Prevention Awareness Day Learn to avoid falling. Risk assessments will be conducted by physical therapists and assistants, sponsored by the Virginia Physical Therapy Association. Sunday, 11 a.m.-3 p.m. Kingstowne Center for Active Adults, 6488 Landsdowne Center, Kingstowne area. 703-339-7676. Free.

Early detection of Alzheimer’s disease Learn about 10 warning signs of the disease for early diagnosis and care, sponsored by the Alzheimer’s Association. Monday, 12:30 p.m. Hollin Hall Senior Center, 1500 Shenandoah Rd., Alexandria. 703-765-4573. Free.

Postpartum mood and anxiety support For mothers and babies. Tuesday, 10-11:30 a.m. Inova Fairfax Hospital, Heart and Vascular Institute, ground-floor conference center, 3300 Gallows Rd., Falls Church. 703-776-6775. Free.

Bereavement support A six-week group. Tuesdays, 7:30-9 p.m. Haven of Northern Virginia, 4606 Ravensworth Rd., Annandale. 703-941-7000. Free, registration required.

Suicide loss support A six-week group for those who have lost a loved one to suicide. Wednesdays, 7:30-9 p.m. Haven of Northern Virginia, 4606 Ravensworth Rd., Annandale. 703-941-7000. Free, registration required.

— Compiled by Jean Mack

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