One of the best and most efficient ways to get in shape is resistance training. It builds muscle, strength, and bone density (and many more benefits). Now, you don’t have to be a power lifter or grunt & groan with massive amounts of weight but you do need to challenge your body.
Think about it, before the modernization of our society people had to perform lots of manual labor. Most of that is gone today. However, by lifting weights 3 times a week you can achieve a healthy, strong body.
The best place to start is with a personal trainer. They can assess your current strength levels and then design a balanced program to help you get stronger over a period of time by incrementally increase the load, utilizing various techniques, and adding in lots of variety.
Plus, they can teach you how to warm up, lift with proper technique, and they can also track your progress and demonstrate how much stronger you become.
So, don’t be afraid to lift some weight!