Running rhythm is like finding your perfect flow, it’s having unconscious control of your running movements, your posture, your arm drive, your stride, your foot fall. When you first learn to run, all these factors are at the forefront of your mind, with practise you develop running rhythm and running efficiency.
However, your running rhythm and efficiency can be impacted when you’re tired, stressed, cold/hot or nervous; the subsequent knock-on effect is that your running rhythm and cadence can be impaired.