For over 40 years, Keiser has been changing the way people of diverse ages and abilities exercise,
while helping to improve their performance and quality of life. However, this success story began
over 45 years ago when Dennis Keiser was hired to design the first variable resistance machines for
a leading manufacturer. A year later he launched “Commercial Design”, a consulting engineering
company that specialized in exercise equipment design. In 1976 Dennis’ brother Randy joined him
and a year later they formed Keiser Corporation. After a number of patents in both weight stack
variable resistance design and hydraulic resistance design, Dennis applied for patent protection
on a totally new concept for variable resistance using compressed air (pneumatics).
In 1978 the brothers introduced to the world the first air powered variable resistance exercise
machines for building strength and power.