1. MD Systems

DynX Validity


R.L. Wiley, PhD.

2. Strength Norms


3.  Grip & Pinch Test Protocol

ASHT Publication

4.  Medical Studies

5.  Related Studies



6.  Cardiovascular Health

7.  Caution-ContraIndications

DynX product evolved from basic
research conducted by MD Systems’
cardiopulmonary physiologist, Ronald L.
Wiley, PhD, focused on controlled
isometric hand-grip exercises as a means of improving cardiovascular health. A review of published scientific literature, summarized by David W. Ferguson, PhD. explains physiological mechanisms invoked by Dr. Wiley’s exercise protocols for purposes of FDA clearances.  These studies and scientific data revealed a need to develop a multi-purpose exercise and testing tool for researchers, clinicians, technicians, and sports trainers to address not only hand-arm therapy and upper body strength, but also a broad range of health issues.   Information provided in this section is relevant to this research, exercise regimens, and product utility, including contra-indications for use of the exercise regimens, which are similar to those applicable to most exercise equipment.
  • Grey Facebook Icon
  • Grey Twitter Icon
  • Grey YouTube Icon

NEW clinical device for use in handgrip strength measurement and rehabilitation of hand strength

NEW protocols for improving muscle strength fully controllable by professional therapists


News Medical Life Sciences

The strength of a person’s hand-grip could be an indicator of their cardiovascular risk, suggest findings from a major study published in The Lancet.

The research, which included almost 140,000 people from 17 countries found that having a weak grip strength was associated with an increased risk of heart attack, stroke and shorter survival.

© 2017 MD Systems - site created by Royal Support Services