What exercises may reduce low back pain?

From Healthwise

Exercises that may help reduce or prevent low back pain include:

• Aerobic exercise, to condition your heart and other muscles, maintain health, and speed recovery.
• Strengthening exercises, focusing on your back, stomach, and leg muscles.
• Stretching exercises, which keep your muscles and other supporting tissues flexible and less prone to injury.

Some exercises can aggravate back pain. If you have low back pain, avoid:

• Straight leg sit-ups.
• Bent leg sit-ups or partial sit-ups (curl-ups) when you have acute back pain.
• Lifting both legs while lying on your back (leg lifts).
• Lifting heavy weights above the waist (standing military press or bicep curls).
• Toe touches while standing.