The Leventhal-Sidman Jewish Community Center (333 Nahanton Street) in Newton will offer an 11-week beginner level personal training class on Wednesdays, beginning September 16, from 7-8am. Participants will learn proper form for various exercises and why each exercise is important to one’s overall conditioning. Class includes strength training, core work for abdominals, flexibility and stretching. Cost is $230. Register at www.bostonjcc.org/register. An advanced level class will also be offered on Fridays, September 18-December 18, from 7-8am. The JCC is open to all. For more information, contact 617-558-6459 or fitness@jccgb.org.