In the modern bodybuilding industry, the term "professional" generally means a bodybuilder who has won qualifying competitions as an amateur and has earned a "pro card" from their respective organization. Professionals earn the right to compete in competitions that include monetary prizes. A pro card also prohibits the athlete from competing in federations other than the one from which they have received the pro card.[12] Depending on the level of success, these bodybuilders may receive monetary compensation from sponsors, much like athletes in other sports.
Weight training aims to build muscle by prompting two different types of hypertrophy: sarcoplasmic and myofibrillar. Sarcoplasmic hypertrophy leads to larger muscles and so is favored by bodybuilders more than myofibrillar hypertrophy, which builds athletic strength. Sarcoplasmic hypertrophy is triggered by increasing repetitions, whereas myofibrillar hypertrophy is triggered by lifting heavier weight.[23] In either case, there is an increase in both size and strength of the muscles (compared to what happens if that same individual does not lift weights at all), however, the emphasis is different.
Some bodybuilders use drugs such as anabolic steroids and precursor substances such as prohormones to increase muscle hypertrophy. Anabolic steroids cause hypertrophy of both types (I and II) of muscle fibers, likely caused by an increased synthesis of muscle proteins. They also provoke undesired side effects including hepatotoxicity, gynecomastia, acne, the early onset of male pattern baldness and a decline in the body's own testosterone production, which can cause testicular atrophy.[43][44][45] Other performance-enhancing substances used by competitive bodybuilders include human growth hormone (HGH), which can cause acromegaly.
Comer has an athletic build that comes from years of martial arts and marathon training, not to mention amateur competitive bodybuilding, activities that have taken a toll on her now bandaged 40-something-year-old knees. — Quanta Magazine, "The Art of Teaching Math and Science," 16 June 2019 Teresa Giudice, who's best known as a personality on Bravo's Real Housewives of New Jersey, competed in her first bodybuilding contest Saturday. — Carly Mallenbaum, USA TODAY, "'Real Housewives' star Teresa Giudice shows off new muscles at bodybuilding competition," 10 June 2018 His first wife, Sitora Yusufiy, suggested in an interview with Time magazine, with little evidence other than his penchant for bodybuilding and mirror-gazing, that Omar Mateen could have been gay. — Tim Fitzsimons /, NBC News, "What really happened that night at Pulse," 12 June 2018 The physique competition will be held at McGlohon Theater and includes the following categories: bodybuilding, fitness, men’s physique, figure, bikini, classic physique and women’s physique. — Courtney Devores, charlotteobserver, "Your 5-minute guide to the best things to do in Charlotte | June 22-28," 21 June 2018 Fans who have been following Giudice closely on social media have watched the reality star workout in videos, but Giudice hasn't posted publicly about her first bodybuilding competition. — Carly Mallenbaum, USA TODAY, "'Real Housewives' star Teresa Giudice shows off new muscles at bodybuilding competition," 10 June 2018 Carolyn Marvin, who served as the graduate adviser for both Prosper and Nirenberg, pointed to his thesis, an autoethnography about the subculture of bodybuilding. — Josh Baugh, San Antonio Express-News, "Nirenberg knew immediately that he’d eventually marry Erika Prosper," 17 Mar. 2018 The bodybuilding competition is one of two hosted produced each year in Louisville by Kentucky Muscle promoter Brent L. Jones. — Matt Stone, The Courier-Journal, "Bodybuilders, fitness athletes go flex at 2018 KDF Derby Championships," 29 Apr. 2018 Father John Brown is basically a bodybuilding legend, having won two Mr. Universe titles and three Mr. World crowns. — Jr Radcliffe, Milwaukee Journal Sentinel, "Facts you may have missed about each Packers draft choice in 2018," 4 May 2018

Site enhancement oil, often called "santol" or "synthol" (no relation to the Synthol mouthwash brand), refers to oils injected into muscles to increase the size or change the shape. Some bodybuilders, particularly at the professional level, inject their muscles with such mixtures to mimic the appearance of developed muscle where it may otherwise be disproportionate or lacking.[55] This is known as "fluffing".[56][57] Synthol is 85% oil, 7.5% lidocaine, and 7.5% alcohol.[56] It is not restricted, and many brands are available on the Internet.[58] The use of injected oil to enhance muscle appearance is common among bodybuilders,[59][60] despite the fact that synthol can cause pulmonary embolisms, nerve damage, infections, sclerosing lipogranuloma,[61] stroke,[56] and the formation of oil-filled granulomas, cysts or ulcers in the muscle.[60][62][63] Rare cases might require surgical intervention to avoid further damage to the muscle and/or to prevent loss of life.[64]


Bodybuilding is the use of progressive resistance exercise to control and develop one's musculature for aesthetic purposes.[1] An individual who engages in this activity is referred to as a bodybuilder. In competitive bodybuilding, bodybuilders appear in lineups and perform specified poses (and later individual posing routines) for a panel of judges who rank the competitors based on criteria such as symmetry, muscularity, and conditioning. Bodybuilders prepare for competitions through the elimination of nonessential body fat, enhanced at the last stage by a combination of extracellular dehydration and carbohydrate loading, to achieve maximum muscular definition and vascularity, as well as tanning to accentuate the contrast of the skin under the spotlights. Bodybuilders may use anabolic steroids and other performance-enhancing drugs to build muscles.
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