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Step aerobics is one of several low-impact aerobic exercises, along with water aerobics, dance aerobics and fast walking. [40] Step aerobics is similar to climbing stairs, but performed while staying in one place. The step platform itself is much less expensive and more portable than a StairMaster, and needs no electricity to operate. [28]
Step stools are halfway between a ladder and a stool, being used, as a support platform, for reaching targets that are at heights between approximately 2 and 3 metres (6.6 and 9.8 ft). The most common modern type is made with two separate ladders connected to each other at the upper end, where there is a platform with an area big enough to ...
John H. Balsley (May 29, 1823 – March 12, 1895) was a master carpenter and inventor, inventing a practical folding wooden stepladder and receiving the first U.S. patent issued for a safety stepladder in the year. He was born in Connellsville, Fayette County, Pennsylvania to George H. and Sarah (Shallenberger) Balsley. His father was also a ...
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