What would happen if the heart was a voluntary muscle?

The heart is an involuntary muscle, which means that we do not consciously control its contractions. If the heart were a voluntary muscle, we would have to consciously think about each heartbeat in order to stay alive. This would be extremely difficult and would likely lead to many problems.

For example, if you were running a race, you would have to focus on both your breathing and your heartbeat. This would be very difficult to do, and it would likely lead to you becoming exhausted very quickly. Additionally, if you were sleeping, you would have to wake up every few seconds to consciously contract your heart. This would make it impossible to get a good night's sleep.

Overall, having a voluntary heart would be very detrimental to our health and well-being. It is much better that the heart is an involuntary muscle, so that we can focus on other things while it does its job.