Water, Electrolytes, and Temperature Regulation

Water, Electrolytes, and Temperature Regulation

Water Requirements and Fluid Balance Chapter 8 Major Functions of Water Provides essential building material for cell protoplasm

Protects key body tissues (spinal cord, brain) Maintains normal osmotic pressures Main constituent of blood Regulation of body temperature Important in hearing, vision, taste

Definitions Euhydration normal body water content Hypohydration body water deficit Dehydration the dynamic loss of body water or the transition from euhydration to hypohydration

Daily Water Loss

Urine 1,300 ml Water in feces 100 ml Exhaled air 200 ml Skin (insensible perspiration) 600 ml Sweat 2-3 L/hr TOTAL 2 - ??? liters

Daily Water Intake

Approximate requirement 1 ml/kcal Food 700 ml Metabolism 300 ml Fluids everything else Non-diuretic fluids Diuretic fluids

Heat Production For every 1 liter O2 consumed 4 kcal of heat dissipated 1 kcal of heat used to perform mechanical work, ie. contraction 1000 watt power output would increase

core temp by 1 C every 4 minutes Body can only tolerate a rise of 2-2.5 C before central fatigue occurs Above 40 C, heat exhaustion & stroke Why Dehydration Impairs Performance

Reduced blood volume Decreased skin blood flow Decreased sweat rate Decreased heat dissipation Increased core temp Increase in muscle glycogen use

Effects of Dehydration on Performance At 2% of body weight loss, aerobic performance declines 5-10%. At 5% of body weight loss, aerobic performance can decline up to 30%. At 2.5% of body weight loss, high intensity

effort lasting several minutes can be impaired by 45%. Fluid Replacement Recommedations 12-16 oz of fluid 1 hour before exercise 12-16 oz of fluid 30 min before exercise

6-8 oz every 15 minutes during exercise Normal mouthful is ~ 1 oz 24 oz per pound lost after exercise (150% of weight loss) What to Drink?

Carbohydrate, electrolyte beverage is best immediately before and during exercise 6-8% CHO (glucose polymer/fructose) 50-100 mg Na per 8 oz Increase palatability Maintain thirst

Prevent hyponatremia Increase water absorption Decrease urine production Water is OK for normal re-hydration throughout the day Heat Acclimatization

Must exercise at >70% VO2max Significant changes occur in 7-10 days Benefits Earlier onset of sweating Sweat more Larger sweat glands Increase in total blood volume

Recently Viewed Presentations

  • Collaborate or Die: STEAMy Programming for Teens Marcus

    Collaborate or Die: STEAMy Programming for Teens Marcus

    Ramsey County Library mission statement. Every make and take story time, everything we have traditionally called a "craft" project, every hands on opportunity to learn has been making. The idea that libraries are excellent places for making because bring community...
  • SECTION III: SELECTED SHORTER WORKS OF LITERATURE PGS

    SECTION III: SELECTED SHORTER WORKS OF LITERATURE PGS

    The New Colossus by Emma Lazarus. The New Colossus is a poem written by Emma Lazarus that compares and contrasts the Statue of Liberty to the Colossus of Rhodes, standing tall and welcoming immigrants to the New World. Though in...
  • PROPERTY B SLIDES 3-18-19 National Sloppy Joe Day

    PROPERTY B SLIDES 3-18-19 National Sloppy Joe Day

    Calibri Arial Calibri Light Arial Rounded MT Bold Batang Aharoni Albertus Extra Bold Arial Unicode MS Verdana MS Mincho Felix Titling MS UI Gothic Segoe UI Black Eras Demi ITC Courier New Arial Narrow Old English Text MT Times New...
  • Aftermath of the Drought: Mental/Behavioral Health Resources ...

    Aftermath of the Drought: Mental/Behavioral Health Resources ...

    Drought enters as part of farmer's already stressful life. ... Cambodia, Canada, England, Finland, Hong Kong, Japan, New Zealand, Northern Ireland, Scotland, Singapore, South Africa, Thailand, and Wales ... Mental/Behavioral Health Resources for Drought-Stressed Farmers
  • The Pillsbury Doughboy By Alleen Pace Nilsen And

    The Pillsbury Doughboy By Alleen Pace Nilsen And

    The Steel Workers' union accused automobile executives of trying to steal their benefits. 10. If you pull a tendon in your heel, it can take several weeks to heal (i.e. to regain your health). * Polysemes are spelled the same...
  • 3rd Edition: Chapter 4

    3rd Edition: Chapter 4

    lets her take advantage of known patterns and weaknesses. can guess plaintext, compare with observed ciphertext. 8- ... factoring a big number is hard. 8-Security. RSA in practice: session keys ... special messages to securely close connection. 8-Security. Toy: a...
  • Chapter 7 Packed and headed to jail - Harrellland

    Chapter 7 Packed and headed to jail - Harrellland

    The Polio Hole. A memoir by Shelley Fraser Mickle. recalled in a slide show . by Mrs. Harrell's 6th grade students at PKY, January, 2012. Each of the students wrote a brief summary of a chapter followed by quotes from...
  • 2018 Tax Reform: What You Need to Know

    2018 Tax Reform: What You Need to Know

    Pre-Reform Law. Tax Cuts & Jobs Act. Effective Date. I.R.C. Sections. A taxpayer generally must capitalize the cost of property used in a trade or business or held for the production of income and recover such cost over time through...