Acres of blather, yet again, Wayne. I, and everyone else, understand what RMS means; it is very well defined. What your machine does in order to produce the "RMS" figures it displays is a complete mystery to both you and me. We can draw no conclusions.
Btw, douglis, RMS is only your value of 0.7ish in the case of sinusoidal situations. RMS value depends totally on the time profile and, to measure it accurately, you need a good number of samples over the cycle. A weight lifting cycle will be far from sinusoidal.