Review of Curves

Written by Renee Kennedy


Review of Curves by Renee Kennedy

Overview: According to their web site, Curves isrepparttar largest fitness franchise inrepparttar 115586 world. Curves offers a 30 minute circuit training course. They have 13 pieces of equipment. All ofrepparttar 115587 equipment is hydraulic, there are no weights to add or remove. The object is to keeprepparttar 115588 heart rate going so half ofrepparttar 115589 time you are doing aerobics on boards or steps and halfrepparttar 115590 time you are using strength training equipment. Goals ofrepparttar 115591 Members: Losing inches isrepparttar 115592 main goal ofrepparttar 115593 members at this fitness club.

Cost: $29 per month for a minimum of 12 months. An up front fee of $149 but frequently they run specials andrepparttar 115594 up front fee may only be $75, you would need to call your nearest facility to see what special prices they are offering.

Time Needed: 30 minute routine 3-6 times per week. The amount of days that you decide to go will depend on your individual goals whichrepparttar 115595 staff will help you set.

Melanin: Aging of the Skin and Skin Cancer

Written by Diana Clarke


Melanin: Aging ofrepparttar Skin and Skin Cancer

by Diana Clarke http://yourskinandsun.com

"Ultraviolet (UV) radiation is responsible for 90% ofrepparttar 115585 visible signs of aging onrepparttar 115586 skin of whites," says Dr. Michael J. Martin, former Assistant Clinical Professor inrepparttar 115587 Dept. of Epidemiology and Biostatistics at University of California, San Francisco.

Blacks' skin, however, ages much slower.

Why are most dark-skinned blacks protected from harmful UV rays? Because compared to whites, blacks possess more melanin,repparttar 115588 pigment that gives skin its color.

Melanin

Melanin offers protection against UV rays for blacks and other dark-skinned people. Conversely, fair-skinned people are much less protected and more susceptible to skin cancer. Furthermore, albinos' skin offers no protection.

Although blacks' skin produces more melanin than whites', all skin hasrepparttar 115589 same number of melanocytes,repparttar 115590 cells that manufacturerepparttar 115591 melanin.

Melanocytes manufacture melanin from an amino acid, tyrosin, withrepparttar 115592 help of an enzyme, tyrosinase. Inrepparttar 115593 bottom layer ofrepparttar 115594 epidermis aboverepparttar 115595 dermis, UV light stimulatesrepparttar 115596 production of melanin inrepparttar 115597 form of insoluble melanosomes. These surroundrepparttar 115598 epidermal cells, which move up torepparttar 115599 surface ofrepparttar 115600 skin. The result is a tan.

Blacks' skin produce more melanin, even inrepparttar 115601 absence of sunlight, and their type of melanin, eumelanin, is more effective at blocking solar rays. However, white skin produces melanin only inrepparttar 115602 presence of sunlight and afterrepparttar 115603 UV rays have penetratedrepparttar 115604 lower portion ofrepparttar 115605 epidermis and have caused skin damage.

"Melanin also functions as an excellent free radical scavenger. It affectsrepparttar 115606 delicately designed lipids that hold moisture inrepparttar 115607 stratum corneum (the outermost layer ofrepparttar 115608 epidermis). Ifrepparttar 115609 skin loses its moisture, it becomes rigid and cracks," says Sergio Nacht, PhD., Senior Vice-President of Enhanced Derm Technologies, Inc. in Redwood City.

UV Radiation and Skin

UV-A hasrepparttar 115610 longest wavelength, is not filtered byrepparttar 115611 ozone and passes through glass. It reachesrepparttar 115612 earth all year long andrepparttar 115613 amount is comparatively stable. It can penetraterepparttar 115614 skin down torepparttar 115615 dermis, beneathrepparttar 115616 four layers of epidermis. It is responsible for most ofrepparttar 115617 visible signs of aging, due to damage to collagen and elastic fibers ofrepparttar 115618 connective tissue ofrepparttar 115619 dermis.

UV-A radiation also plays a role inrepparttar 115620 development of sunburns and skin cancer. Tanning salon lamps emit a large amount of UV-A rays to generate tans, sorepparttar 115621 American Academy of Dermatology does not recommend their use.

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