Eager to get in shape for summer? Be cautious—some popular gym exercises can do more harm than good. Poor technique or exercise selection can wreak havoc on your joints and posture. My top cringe-worthy moves include Lat Pull Downs Behind the Neck, which stress the cervical spine, and traditional Sit-ups & Crunches, which strain your neck and back. Avoid Seated Rows with poor form and dangerous Dumbbell Side Bends for your lower back. Lastly, skip the Bench Dips, which place undue pressure on your shoulders. Learn safer, more effective alternatives to achieve your fitness goals.