But the low cost, ease of use and effectiveness of the air muscle exceeds standard pneumatic cylinders. This allows it to be quickly adapted by robotists and hobbyists for immediate use. In some ways the air muscle is similar to Nitinol wire. Mainly in its ability to contract when activated. A quick comparison yields these results.
Nitinol wire is a power hog.
It consumes large amounts of electric current to function. The air muscle operates off of air pressure. While efficiency is lost using electric power to compress air, the compressed air can be stored. Strength and overall power comparison are difficult. The small air muscle can lift 6.5 lbs.