Thursday, March 7, 2013

Article # 363. What Is Lean Body Tissue?



Lean body tissue influences metabolic function, disease risk and appearance. Therefore, you should understand how to manage and assess your own amount of lean tissue for positive health outcomes. On a basic level, lean tissue comprises all body weight other than fat. One lb. of lean mass is metabolically superior to 1 lb. of body fat. Understanding lean mass enables you to make informed fitness decisions.

Two-Factor Theory of Body Composition
The two-factor theory of body composition categorizes body weight as either fat mass or fat-free mass, also known as lean mass. Lean mass comprises muscles, bones, organs and connective tissues. According to the book "Advanced Fitness Assessment and Exercise Prescription" by Vivian H. Heyward, people carry essential fat and non-essential fat. For example, women should maintain a minimum of 10 percent body fat while men require a minimum of 5 percent body fat for normal physiological function. Dipping below required levels may result in impaired metabolism, chronic fatigue and reduced immune-system function.


Healthy Levels
Body composition is defined as body fat percentage, or the percentage of your total weight made up of fat. For example, a person with 10 percent body fat contains 90 percent lean mass. According to Heyward, healthy body fat percentages for 18- to 34-year-old women fall between 20 and 30 percent and increase to 25 to 33 percent for 35- to 55-year-old women. Healthy fat levels for 18- to 34-year-old men range between 5 and 15 percent and increase to 7 to 18 percent for men between the ages of 35 and 55.

Assessing Lean Mass
Although fat content cannot be measured directly, various assessment protocols can estimate your percent of lean tissue. Clinical methods include hydrostatic weighing or dual-energy x-ray absorptiometry, also known as DXA. Hydrostatic weighing measures your weight underwater while DXA performs a full-body scan. Less-clinical methods include skinfold measurement with calipers or handheld bioelectrical impedance analyzers. All methods collect data, which is then plugged into an estimation equation along with age, height and weight measurements. Usually, local gyms or universities administer fitness tests to the public for a small fee or free of cost to the members.

Manage Body Composition
You can improve body composition through reduction of fat mass or accumulation of lean mass. For example, resistance training increases both muscle mass and bone density and contributes to lean mass. On the other hand, dietary restriction and regular exercise can reduce fat mass and subsequent body fat percentages. Whatever your strategy is, maintaining a healthy body composition provides many health benefits. As always, consult a doctor before starting a diet or exercise program.

11 comments:

  1. nike shoes, Cheap Jordans,Cheap Jordan Shoes,Cheap Air Max,Cheap Free Run Shoes,nike shoes,nike outlet,nike factory,nike store,nike factory outlet,nike outlet store,cheap nike shoes,nike sneakers, toms outlet, toms outlet,tom shoes,toms shoes outlet,tom shoes,toms wedges,cheap toms,toms.com, air jordan, air jordan,jordan shoes,cheap jordans,air jordans,jordan retro,air jordan shoes,jordans,jordan 11,jordan xx9,jordan 6,new jordans,retro jordans,jordan retro 11,jordan 5,air jordan 11,jordans for sale,jordan 4,jordan 1,jordan future,jordan 3,jordan 12,michael jordan shoes,air jordan retro, cheap jordans, cheap jordans,cheap jordan shoes,cheap jordan,cheap jordans for sale,jordans for cheap,jordan shoes,jordans,air jordan,jordan retro,jordan 11,jordan xx9,jordan 6,new jordans,air jordans,retro jordans,jordan retro 11,jordan 5,air jordan 11,jordans for sale,jordan 4,jordan 1,jordan future,jordan 3,jordan 12,michael jordan shoes,air jordan shoes,air jordan retro, jordan retro, jordan retro,jordan shoes,air jordan,air jordans,retro jordans,air jordan retro,jordans,jordan 11,jordan xx9,jordan 6,new jordans,cheap jordans,jordan retro 11,jordan 5,air jordan 11,jordans for sale,jordan 4,jordan 1,jordan future,jordan 3,jordan 12,michael jordan shoes,air jordan shoes, air max 90, air max 90,nike air max 90,air max 95,air max 2014,air max 2013,air max 1,nike air max,air max,nike air max 2014,airmax,nike air max 2013, air max 95, air max 95,nike air max 95,air max 90,nike air max 90,air max 2013,nike air max,air max,air max 2014,nike air max 2014,airmax,nike air max 2013, nike free 5.0, nike free 5.0, nike free trainer 5.0,nike free run 5.0,free running 2,nike free run,nike free,free running,nike running shoes,nike free trainer,free runs,free run 5.0, omega watches, omega watches,omega watch,replica watches,rolex watches,replica omega watches,rolex,watches for men,watches for women,rolex watches for sale,rolex replica,rolex watch,cartier watches,rolex submariner,fake rolex,rolex replica watches,replica rolex, ralph lauren outlet, ralph lauren outlet,ralph lauren outlet online,polo ralph lauren outlet,polo ralph lauren outlet online,polo ralph lauren,ralph lauren,polo ralph,polo shirts,ralphlauren.com,polo outlet,ralph lauren polo, oakley sunglass

    ReplyDelete
  2. oakley sunglasses,cheap oakley,cheap oakley sunglasses,oakley sunglasses cheap,oakley outlet,oakley sunglasses outlet,oakley vault,oakleys,oakley.com,sunglasses outlet,cheap sunglasses,oakley prescription glasses,fake oakleys,oakley glasses,oakley store,fake oakley,oakley sale,cheap oakleys,discount oakley sunglasses, ray ban sunglasses, Ray Ban Sunglasses,Ray Ban Outlet,Ray Ban Sale,Cheap Ray Bans,Cheap Ray Ban Sunglasses,ray ban sunglasses outlet,ray ban,rayban,ray bans,ray-ban,raybans,ray ban wayfarer,ray-ban sunglasses,raybans.com,rayban sunglasses,cheap ray ban, burberry, burberry,burberry outlet,burberry outlet online,burberry factory outlet,burberry sale,burberry handbags, chanel bags, chanel bags,chanel handbags,chanel sunglasses,chanel outlet,chanel purses,chanel handbags official site, coach outlet store, coach outlet,coach outlet store,coach outlet store online,coach outlet stores,coach factory outlet,coach factory,coach factory online,coach factory outlet online,coach outlet online, chaussures louboutin, louboutin,louboutin pas cher,christian louboutin,louboutin chaussures,louboutin soldes,chaussure louboutin,chaussures louboutin,chaussure louboutin pas cher,louboutin france, sac michael kors, michael kors,sac michael kors,michael kors sac,michael kors pas cher,sac michael kors pas cher,michael kors france, north face outlet, north face outlet,the north face,north face,the north face outlet,north face jackets,north face jackets clearance,northface, yoga pants, yoga pants,lululemon,lululemon outlet,lululemon athletica,lululemon addict,lulu lemon,lulu.com,lululemon.com, beats by dre, beats by dre,beats headphones,beats audio,beats by dr dre,beats by dre headphones,dr dre,dre beats,beats by dr,dr dre beats,dre headphones,beats by dr. dre,cheap beats, ferragamo, ferragamo,salvatore ferragamo,ferragamo shoes,ferragamo outlet,salvatore ferragamo outlet,ferragamo belts,ferragamo belt,ferragamo outlet, nike blazer, nike blazer,blazer nike,nike blazer pas cher,Chaussures Nike Blazer,Nike Blazer Femme, nike air force, swarovski

    ReplyDelete