Logan Steele
Fake muscles can refer to a few different things. In the context of biomedical engineering, artificial muscles are being developed in labs to replace injured human muscles. These muscles are grown from stem cells and are as strong and good at self-repair as natural muscles. In the context of fitness and bodybuilding, fake muscles can refer to the use of cosmetic procedures or substances, such as muscle implants, synthol injections, or muscle fat grafting, to enhance the appearance of muscles. Additionally, in the world of cosplay and costumes, fake muscles can refer to padded clothing or suits that create the illusion of muscular definition. These products are often used for entertainment purposes and are available through online retailers.
Characteristics and Values of Fake Muscles
| Characteristics | Values |
|---|---|
| Purpose | To give a bigger, more defined shape to muscles |
| Types | Synthol injections, muscle implants, muscle fat grafting, bicep implants, pectoral implants, ab implants |
| Materials | Polymers, carbon nanotubes, paraffin, shape-memory alloys, liquid crystalline elastomers, metallic alloys, stem cells |
| Commercial Availability | Unique, custom, and handmade fake muscle pieces are available on Etsy |
| Performance | Can lift and generate 100 times more weight and power than a human muscle of the same length and weight |
| Applications | Used for testing new drugs, potentially replacing injured human muscles, and in robotics and automation |
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What You'll Learn
Fake muscle products for humans
Fake muscles are products designed to mimic the appearance of natural muscles. They are used for a variety of purposes, including casual wear, professional performance, special effects makeup, and anatomical education. When shopping for fake muscles, several factors should be considered to choose the right product.
Firstly, it is important to define the intended use. For those seeking a natural and comfortable look for casual wear, stretchy fabric muscle suits are a good option. On the other hand, for professional performances or special effects, foam latex or silicone muscles that can be shaped to achieve the desired effect are more suitable. The quality of the product is also crucial; higher-quality fake muscles may cost more but tend to last longer and provide better results. Durability, seamless stitching, and well-made construction are indicators of good quality.
The level of realism varies among fake muscle products. For a realistic option, choose products with detailed skin texture and natural-looking veins. Additionally, comfort is an important consideration. Opt for soft, skin-friendly materials, avoiding products with rough edges or hard surfaces that can cause discomfort during extended wear. The weight of the muscle suit or prosthetic is another factor to consider, as heavier options can be tiring to wear for long periods.
Some fake muscles are designed as prosthetics, covering areas where actual muscles are absent due to injury or surgery. These can be worn under or on top of the skin. Proper maintenance and storage are crucial for the longevity of fake muscle products. Most can be cleaned with a damp cloth without the need for soap or cleaning products, and they should be stored in a cool, dry place away from direct sunlight.
In addition to cosmetic purposes, fake muscle tissue is used in training and competition by athletes, bodybuilders, and fitness trainers. It helps them achieve visually impressive physiques without the need for actual muscle mass. Fake muscles are also valuable tools for understanding anatomical structures, muscle groups, and human physiology, making them useful in anatomy education, physical therapy demonstrations, and medical training.
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Artificial muscle for lab-grown replacements
Artificial muscles grown in labs have been a topic of interest for researchers for the last 15 years. The ultimate goal is to create lab-grown muscle replacements for permanently injured human muscles.
In 2022, biomedical engineers from Duke University published a paper detailing how they isolated stem cells from mouse muscle and grew them into new muscle fibres. The lead researcher, Nenad Bursac, described how these lab-grown muscles were able to contract strongly, comparable to the contracting forces of an actual mouse muscle. Furthermore, these fibres were also self-healing, as the stem cells could fuse to rebuild lost tissue in the event of an injury. This breakthrough could be used to test the effectiveness of new drugs designed to improve muscle function.
While this research used mice, Bursac's team has also successfully run the same trials with human muscle. To replace an injured muscle, doctors would need to take a small sample of muscle tissue from the patient, cultivate stem cells from it, use those to grow new tissue, and then transplant the new tissue back into the patient. However, one challenge that remains is providing a large enough blood supply to keep the lab-grown muscle alive while it is outside the body. Muscles require a lot of blood flow to survive, and creating an artificial blood supply for lab-grown muscles larger than a millimeter will require novel technology.
In addition to their potential use in medicine, artificial muscles are also being explored for use in soft robotics. Researchers at MIT have developed a method to grow artificial muscle tissue that twitches and flexes in multiple directions, mimicking the iris of the human eye. This technology could be used to create "biohybrid" robots that can move through spaces where traditional machines cannot.
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Biomedical engineering and artificial muscle
Biomedical engineering has made significant strides in the development of artificial muscles, with a wide range of potential applications across various industries, including food, technology, and medicine. The engineering of bioartificial muscles stands out for its versatility and ability to impact multiple sectors simultaneously.
One of the key focuses of this field is the artificial production of muscle tissue through biofabrication processes. This involves recreating the complex structure and functionality of native tissues, particularly skeletal muscle tissue, which is composed of muscle cells, fibroblasts, and adipocytes. Skeletal muscle is of particular interest due to its central importance in our daily activities, including voluntary movements and respiration. It is also one of the most regenerative organs in the body, although various factors can impair its function and capacity for self-repair.
Recent advances in tissue engineering and biofabrication technologies have led to the development of a bionic artificial muscle called "ExoMuscle." This artificial muscle mimics the sarcomere in skeletal muscle, enabling it to contract "myofilaments" and outperform skeletal muscle in certain performances. It boasts adjustable actuation stress, a wider optimal length, a higher contraction ratio, velocity-independent output, excellent power density, and actuation efficiency.
The applications of bioartificial muscles include cultured meat, biorobotic systems, and muscle implants. In the food industry, bioartificial muscles can be used to create cultured meat products. In robotics, artificial muscles can enhance the performance and functionality of machines. In medicine, muscle implants and regenerative therapies can be developed to treat skeletal muscle injuries and diseases, such as volumetric muscle loss (VML) injuries, which currently have limited treatment options.
Additionally, the integration of bioengineering principles and technologies into muscle biology has opened up new opportunities for improving patient care. This includes the development of new drug, cell, and gene therapies for muscle disorders. The utilization of engineering techniques allows for the creation and manipulation of 3D cellular environments, sophisticated imaging, and the study of cell–cell and cell–material interactions.
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Artificial muscle and its power criteria
Artificial muscles are an emerging technology with a wide range of potential applications in industry, medicine, robotics, and other fields. They are highly flexible, versatile, and have a high power-to-weight ratio compared to traditional rigid actuators.
The power criteria for artificial muscle technologies include stress, strain, strain rate, cycle life, and elastic modulus. Other criteria that have been considered include actuator density and strain resolution. Researchers also measure the speed, energy density, power, and efficiency of artificial muscles.
One type of artificial muscle is the thermally-activated muscle, which can respond to temperature changes without using any power. For example, tiny artificial muscles made of twisted carbon nanotubes filled with paraffin are 200 times stronger than human muscle. Shape-memory alloys (SMAs), liquid crystalline elastomers, and metallic alloys can also function as artificial muscles, changing shape when exposed to heat.
Another type of artificial muscle is the electro-active polymer (EAP), which has a lower weight, faster response, higher power density, and quieter operation than traditional actuators. Both electric and ionic EAPs use feedback control loops or closed-loop control systems for actuation. Examples of EAPs include piezoelectric polymers, dielectric actuators (DEAs), electrostrictive graft elastomers, liquid crystal elastomers (LCE), and ferroelectric polymers.
Pneumatic artificial muscles (PAMs) offer greater flexibility, controllability, and lightness compared to conventional pneumatic cylinders. An example of a PAM application is the power-assist glove from Okayama University, Japan, which can achieve approximately 20 N of force, enough to interact with objects in daily life.
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Electroactive polymers (EAPs) and artificial muscle
Electroactive polymers (EAPs) are materials that exhibit excellent electroactive character and are often used in artificial muscle applications. They can be activated by an electric stimulus and fixed into a temporary shape, returning to their permanent shape when the stimulus is removed. This unique property of EAPs makes them highly attractive for use in prosthetics and soft robotics, as well as in the development of exoskeletons, drug delivery systems, cell biology, and microactuators.
EAPs can be easily manufactured in various shapes due to the ease of processing many polymeric materials, and they are generally divided into two principal classes: dielectric and ionic. Dielectric EAPs are materials in which actuation is caused by electrostatic forces between two electrodes that squeeze the polymer. This type of EAP typically requires a large actuation voltage but very low electrical power consumption, and they require no power to maintain the actuator at a given position. Examples include electrostrictive polymers and dielectric elastomers, which are notable for their large deformation, fast response speed, and high energy density.
Ionic EAPs, on the other hand, are activated by the mobility or diffusion of ions. They can be further divided into ionic polymer gels, conductive polymers, and ionic polymer-metallic composites. While EAPs have shown promising results in certain applications, there are still challenges to be addressed, such as robust control, modelling non-linear behaviour, and scalable fabrication for real-world conditions.
The first commercially developed device incorporating EAPs as artificial muscles was produced in 2002 by Eamex in Japan. This device was a fish that could swim on its own by moving its tail using an EAP muscle. In 2005, the first Armwrestling Match of EAP Robotic Arm Against Human Challenge was held, where research groups competed to design an EAP robotic arm that could defeat a human in arm wrestling. While this field is still in its early stages, EAPs have the potential to revolutionize various industries with their unique properties and applications.
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Frequently asked questions
Fake muscles can refer to artificially grown muscles in a lab setting or cosmetic procedures that give the appearance of bigger muscles. Artificially grown muscles are made from stem cells and are as strong and good at self-repair as natural muscles. They are being studied as lab-grown replacements for permanently injured human muscles. On the other hand, cosmetic fake muscles include muscle implants, synthol injections, and muscle fat grafting, which provide a more defined shape to the muscles without any functional benefits.
There are several types of cosmetic fake muscles, including muscle implants, synthol injections, and muscle fat grafting. Muscle implants, such as bicep, pectoral, and ab implants, are surgically inserted to increase muscle size. Synthol is an oil that is injected into muscles to make them appear larger, but it is rarely used due to its high risk. Muscle fat grafting involves transferring fat from one part of the body to the muscles to enhance their shape.
Online marketplaces like Etsy offer a range of fake muscle products for costumes and cosplay purposes. These include padded undershirts, muscle suits, and jumpsuits that mimic the appearance of muscular arms, chests, and legs.
