How many times does the heart beat in a day? The answer depends on the person. A littlebaby’s heart is smaller and it has to beat more often to do its job of __36__ the blood around thebaby’s body. Women are often smaller than men, so their hearts __37__ to beat more often thanmany men’s heats do. __38__ we exercise, we increase the need in our cells for energy and oxygen.The heart pumps faster __39__ exercise. So the heart beats more often in a day with a lot ofexercise. 

For the same __40__ ,our hearts beat slower when we sleep because our bodies are resting andnot making such a big __41__ for energy and oxygen. The hearts of people who are __42__ fit beatfewer times in a day. Lots of other things like age, body size, and emotions can __43__ how fast orslow our hearts beat.