Lie on a bench, head over the end, with your feet flat on the floor. Lower weights in a semicircular motion towards floor. Go as low as you can without pain. Go back up using the same path. Keep your elbows in! Can also be done with your arms straight, or with two dumbbells (one in each hand).
Main Muscle Worked: Chest
Other Muscles Worked: Triceps, Shoulders, Lats
Equipment required: Bench, dumbbells