I added the second egg and stirred it with some serious gusto (arm got tired after very few rotations!) (orangette.net)
A balanced workout would include a modest number of spinal flexion exercises and, then, only if you have a healthy back, as well as few rotation exercises to target the obliques. (cathe.com)
A quiet motor may have fewer rotations per minute in the blades. (breedingbusiness.com)