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Strongest man on earth - rolling frying pans and wrenches by hands, Rate My Science
- Published_at:2012-06-30
- Category:Science & Technology
- Channel:RateMyScience
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- description: http://ratemyscience.com/ Publish your projects or ideas FREE at Rate My Science. Skeletal muscle or "voluntary muscle" is anchored by tendons (or by aponeuroses at a few places) to bone and is used to effect skeletal movement such as locomotion and in maintaining posture. An average adult male is made up of 42% of skeletal muscle and an average adult female is made up of 36%. A display of "strength" (e.g. lifting a weight) is a result of three factors that overlap: physiological strength (muscle size, cross sectional area, available crossbridging, responses to training), neurological strength (how strong or weak is the signal that tells the muscle to contract), and mechanical strength (muscle's force angle on the lever, moment arm length, joint capabilities). Vertebrate muscle typically produces approximately 25 N (5.6 lbf) of force per square centimeter of muscle cross-sectional area when isometric and at optimal length. The 1992 Guinness Book of Records records the achievement of a bite strength of 4,337 N (975 lbf) for 2 seconds. The myometrial layer of the uterus may be the strongest muscle by weight in the female human body. At the time when an infant is delivered, the entire human uterus weighs about 1.1 kg (40 oz). During childbirth, the uterus exerts 100 to 400 N (25 to 100 lbf) of downward force with each contraction. The density of mammalian skeletal muscle tissue is about 1.06 kg/liter.
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