The free-running rhythm of a human is slightly more than 24 hours.
Mostly environmental cues acts as the external cues for animals including humans. But in the absence of all such external cues a free-running rhythm is developed. In humans it is more than 24 hours. It is because of the light around that we measure our sleep cycles and when to wake up. This is a circadian rhythm developed naturally within humans as a result of external cues.
So, Free running rhythm is a body's own rhythm, which is normally around 24 hours in humans.
Learn more about free running rhythm at https://brainly.com/question/4095233
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