Do you find yourself saying: "I really need to get back in shape," or "I'm at a plateau with my weight-loss and exercise program"?   Bid on a session of three 90-minute, small-group classes of pilates and/or yoga or a one-hour private session of personal training held in Sherborn at the home studio of certified pilates and yoga instructor and personal fitness trainer Leonie Foy.  Come and strengthen your "powerhouse" - the muscles in your abdomen, hips, and back - and use that strength to improve performance in activities such as sports, dance, horseback riding, and golf as well as daily living.   Yoga, pilates mat and on-the-ball conditioning enhance core strength, increase flexibility, and improve posture and balance. The inclusion of upper body muscle conditioning and yoga asanas in class will deliver a whole new you in time for summer. Leonie can also conduct fitness, body-composition, flexibility, and postural assessments and develop an individual exercise program for you.