Weight training isn’t just for body builders. You’ve heard this before, right? Weight training burns calories, strengthens your heart, boost your mental well-being, and prevents injuries. It’s also great as we age; even light weight training can protect bone density and preserve muscle mass as we age.There is no shortage of apps and websites that offer free content to help you get in shape. You’ll find apps to help you monitor your heart rate and wearable Android and Apple devices that make working out more fun.If you’re thinking about adding weight training to your regular workout routine, or if you’re just looking for a resource to change up your weight training, and you don’t want to pay a personal trainer, we found a website that offers free, user-friendly content.The website is called MuscleWiki. It’s a no-frills wiki (collaborative repository of content) that contains how-to videos and step-by-step instructions for exercises that target whatever part of your body needs it. What it doesn’t do is put together a workout routine for you. As always, before beginning any weight-training program, check with your doctor to find out what you should and shouldn’t do.