Which is the strongest muscle in the human body?

There is no single answer because strength can be measured in different ways. The masseter, the jaw muscle that closes the mouth, is often called the strongest because it can generate enormous pressure for its size, allowing the back teeth to bite with hundreds of newtons of force. The gluteus maximus in the buttocks is the largest muscle and powers standing, climbing and running. The soleus in the calf can pull with great force and keeps us upright. The heart is sometimes called the hardest-working muscle, beating around 100,000 times a day without rest.