Part 11 Acid-Base Balance During Exercise

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Section 11 Acid-Base Balance During EXERCISE PHYSIOLOGY Theory and Application to Fitness and Performance, 6 th version Scott K. Powers & Edward T. Howley

Objectives Define terms corrosive, base, and pH Discuss significance of corrosive base control to exercise execution List central intracellular and extracellular supports Explain the part of breath in the direction of corrosive base status amid exercise Outline corrosive base direction amid exercise Discuss primary ways that hydrogen particles are delivered amid exercise

Acids, Bases, and pH Acid Molecule that can free H + particles Base Molecule that is equipped for joining with H + particles pH Measure of H + particle focus pH = - log 10 [H + ]

pH of Blood Normal pH = 7.4 Acidosis pH < 7.4 Alkalosis pH > 7.4 Abnormal pH can disturb ordinary body capacity and influence execution

Acidosis and Alkalosis Fig 11.2

Sources of H + Ions During Exercise Volatile acids Carbon dioxide Fixed acids Sulfuric corrosive Phosphoric corrosive Organic acids Lactic acids

Sources of Hydrogen Ions Due to Metabolic Processes Fig 11.3

Importance of Acid-Base Regulation During Exercise Failure to keep up corrosive base adjust may debilitate execution Inhibit ATP creation Interfere with muscle constriction Acid-base adjust kept up by cradles Release H + particles when pH is high Accept H + particles when pH is low

Extracellular Bicarbonate Hemoglobin Blood proteins Buffers Intracellular Proteins Phosphate bunches Bicarbonate buffering framework CO 2 + H 2 O  H 2 CO 3  H + HCO 3 -

Regulation of Acid-Base Balance Lungs Increased blood PCO 2 Results in low pH Increases ventilation CO 2 is "passed over" pH brought down Kidneys Regulate blood bicarbonate fixation Important in long haul corrosive base adjust

pH Changes During Exercise Blood pH Declines with expanding force practice Muscle pH Declines more drastically than blood pH Muscle has bring down buffering limit

Changes in Arterial Blood and Muscle pH During Exercise Fig 11.4

Buffering of Lactic Acid During Exercise Lactic corrosive is cushioned by bicarbonate Increases in lactic corrosive joined by reductions in bicarbonate and blood pH Respiratory pay "Passes over" abundance CO 2

Changes in Blood Lactic Acid, HCO 3 - , and pH During Exercise Fig 11.2

Regulation of Acid-Base Balance During Exercise First line Cellular cushions Proteins, bicarbonate, and phosphate bunches Blood supports Bicarbonate, hemoglobin, and proteins Second line Respiratory remuneration

Lines of Defense Against pH Changes During Intense Exercise Fig 11.6

Chapter 11 Acid-Base Balance During Exercise