Weight training is a type of strength training that uses weights for resistance. Weight training provides stress to the muscles, causing them to adapt and get stronger, similar to the way aerobic conditioning strengthens your heart. Weight training can help you tone your muscles, improve your appearance and fight age-related muscle loss.

While weight training offers important health benefits when done properly, it can lead to injuries, such as sprains, strains and fractures, if not done correctly.

For best results, consider these six basic weight training principles.