acute responses to exercise

acute responses to exercise

1. Respiratory

   • Ventilation
     • Lungs
       • Tidal Volume (TV)
       • Respiratory Rate (RR)
     • V = TV x RR
   • Diffusion
     • oxygen IN
       • Lungs IN -alveoli
         • red blood cells - haemoglobin
           • Muscle Tissue
             • carbon dioxide OUT
               • Lungs OUT- alveoli
             • O2 attaches to myoglobin
               • transported to mitochondria
                 • Transformed into ATP

2. Cardiovascular

   • Venous return
     • because blood leaves heart quick we need to have blood return just as fast
     • 3 pumping mechanisms
       • muscle pump
       • respiratory pump
       • vasoconstriction
   • blood pressure
     • S/D
     • Systolic blood pressure
       • arteries contract
     • diastolic blood pressure
       • Arteries relax
   • Redistribution of blood flow
     • Rest
       • Muscle 20%
     • Maximal intensity Exercise
       • muscle 84%
     • vasodilation
     • vasoconstriction
   • cardio output (Q)
     • amount of blood pumped out of heart in 1 min
     • Litres/minute
     • Q = SV x HR
     • stroke volume (SV)
     • heart rate (HR)
     • controls where blood goes
   • A-VO2 difference
     • difference of Oxygen concentration between arterioles and venules
   • Blood volume
   • oxygen consumption

3. muscular

   • motor unit trecruitment
     • motor neuron and the muscle fibres it stimulates
   • Energy substrate
     • ATP-PC energy system
       • Creatine Phosphate
     • anaerobic glycolysis energy system
       • CHO- glucose
       • fats
     • aerobic energy system
       • fats
   • temperature
     • stimulates sweat glands
     • heat is by product of ATP resynthesis
   • lactate, H+