Heart Rate Variability This is another index to determine the health of your nervous system. This is another revealing look at how your body can stop your weight loss efforts.
Heart Rate Variability
There is another indicator that is unique to the healthy and fit:1,2,3 Their heartbeats are irregular when recovering. The time between the beats changes a lot. This is called heart rate variability. Sign of Health and Fitness
This is a sign of health and fitness. With the unfit, there is no variability. This is used as a predictor of heart attack and predictor of mortality.4,5 "What Does It Look Like?"
A great video about heart rate variability can be seen it on this Youtube video ... Metabolism MakeoverIn the “Metabolism Makeover”, using the heart rate variability to gauge your level of fitness will be too expensive and cumbersome so we will use the heart rate recovery. But I did want to let you know that it exists as a tool and as a tool to measure fitness.

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Return from "Heart Rate Variability" to "Fitness Test"
- Ken Umetani, MD, Donald H. Singer, MD, FACC, Rollin McCraty, PhD and Mike Atkinson. Twenty-Four Hour Time Domain Heart Rate Variability and Heart Rate: Relations to Age and Gender Over Nine Decades. Journal of the American College of Cardiology. 1998; 31 (3): 593-601.
- Rollin McCraty, PhD, Stuart Lanson, MD and Mike Atkinson. Assessment of Autonomic Function and Balance in Chronic Fatigue Patients Using 24-Hour Heart Rate Variability Analysis. Clinical Autonomic Research. 1997; 7: 237.
- Rollin McCraty, PhD, Mike Atkinson, Dana Tomasino, BA and William P. Stuppy, MD. Analysis of Twenty-Four Hour Heart Rate Variability in Patients with Panic Disorder. Biological Psychology. 2001; 56 (2-3): 131-150.
- Bigger JT Jr, Fleiss JL, Steinman RC, Rolnitzky LM, Kleiger RE, Rottman JN. Frequency domain measures of heart period variability and mortality after myocardial infarction. Circulation. 1992;85(1):164-171.
- Kleiger RE, Miller JP, Bigger JT Jr, Moss AJ. Decreased heart rate variability and its association with increased mortality after acute myocardial infarction. Am J Cardiol. 1987;59(4):256-262.

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