As a beginner, lifting weights isn't always easy, and no fitness expert will never tell you to use a 20-pound dumbbell first.

Weights should be added gradually and the actual size of them should suit your specific fitness needs. For example, you probably don't need to master using a 20-pound dumbbell unless you're reaching for a specific fat loss or muscle mass goal.

Bodybuilder and neurosurgeon Dr. Brett Osborn says weight training is surrounded by plenty of myths that confuse the public. If you are interested in picking up some weights, you shouldn't let these misconceptions (or as he calls them, "conventional wisdoms") stop you.

There are tons of benefits to adding weight to your routine. Studies have shown weight lighting can create non-bulky muscles in your body, improve muscle coordination, and of course, assist your body with weight loss, according to Forbes. Osborn says while cardio workouts and healthy eating are all just as important, you're more likely to get results if you start pumping iron.

And no, not all bodies are meant to work out like bodybuilders — if you're worried about where to start, contact a fitness professional first.

Osborn goes through some of the most common myths he hears about lifting weights here. Which ones do you hear the most? Let us know in the comments below: