While established methods for determining physiologic exercise thresholds and intensity distribution such as gas exchange or lactate testing are appropriate for the laboratory setting. they are not easily obtainable for most participants. Data over the past two years has indicated that the short-term scaling exponent alpha1 of Detrended Fluctuation Analysis (DFA a1). a heart rate vari... https://www.roneverhart.com/Gibson-SG-Supreme-Electric-Guitar-Fireburst-p25297/