How thick can your heart muscle become?

Can anyone tell me how to become thick because im little and I really want to gain weight but not get to damn fat if you know...

What causes heart palpitations shakiness yawning exhaustion and muscle weakness?

I have really good muscle tone in my legs but it makes them kind of thick and I want to have skinny legs how can I keep the m...

Im a long distance runner with a resting hr of 46bpm I keep getin told that its to low and that I need help but because of my...

What are some good ways to develop fast twitch muscle fiber? Anyone know?

How to get thick...what are ways if you have a fast metaballism...

how do i lose my thick thighs??

I heard that when running, the most used muscle is your abdomnal??? is it true??

what are the major superficial muscle groups? what do they do? how do they work?

Am I just thick? im 5'2'' and 133. my body fat percentage is 23.6% which is in the fitness range. I have like, really thick ...