Weight training is too stressful on my joints. Exercises should be performed in a controlled and smooth manner, with proper posture and stabilization. A good instructor will always stress proper posture, stabilization, and movement speed during the exercise. If I lift weights, I could get a hernia. The risk is small IF the proper technique is learned and used.
Correct training involves proper breathing, exhaling on the exertion, and correct lifting mechanics.
Respecting the amount of weight you can safely lift is also important. Good instructors insist that their clients rely on proper form and technique rather than just trying to lift very heavy weights. Resistance athletes train much harder and longer, but it isn't necessary for the average exerciser. Weight training will make a woman look like a man. Weight training will shape a woman's muscles while retaining the female shape.