The Heart-comp 1 PE

• Prior to exercise there is an anticipatory rise
• Before exercise adrenaline is released and directly stimulates the SA node to increase HR
• At the start of exercise, there is a rapid increase of HR and Q
• At the start, neural stimulation of medulla oblongata begins
• Proprioreceptors detect motion
• Chemoreceptors detect decreased ph, oxygen and increased carbon dioxide
• Baroreceptors detect increased blood pressure
• There is a continued increase of adrenaline
• During sub max, HR and Q plateaus
• During sub max, there is increased temperature and VR, maintained BCP stimulation, maintained release of adrenaline
• During max, there is continued but slower increase to max values
• During max, increased BCP stimulation, increased adrenaline, increased temperature
• During immediate recovery, there is rapid decreases in HR and Q
• During immediate recovery, there is decreased BCP stimulation to medulla oblongata, decreased adrenaline and decrease temperature and VR
• During Later recovery, there is a slower decrease towards resting values, which is longer in max intensity work
• During later recovery, oxygen debt has to be repaid and HR and Q are elevated to remove lactic acid and carbon dioxide
• At rest SV= 65/70ml
• At rest HR= 70/72 bpm
• At rest Q= 5 L/min
• At Sub Max SV= 80/100 ml
• At Sub Max HR= 100/130 bpm
• At Sub Max Q= 10/15 L/min
• At Max SV= 100/120 ml
• At Max HR= 220-age (180)
• At Max Q= 20/40 L/min
• Stroke volume is volume of blood ejected from ventricles per beat
• heart rate is number of beats per minute
• cardiac output is volume of blood ejected from ventricles per minute
• barorecptors detect increase blood pressure
• proprioreceptors detect motion
• chemoreceptors detect increased carbo dioxide, ph and decreased oxygen