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The Onset And Magnitude Of Cardiovascular Drift Depend On Exercise Intensity In Runners
- 1. The Onset and Magnitude of Cardiovascular Drift Depend on Exercise Intensity in Runners by Jena Winger A SENIOR PROJECT Presented to the Department of Exercise Science and the College of Liberal Arts in partial fulfillment of the requirements for the degree of Bachelor of Arts March 17, 2009
- 2. Cardiovascular Drift 130 140 150 160 170 180 190 5 10 15 20 25 30 35 40 45 50 55 60 Time (min) Heart Rate (bpm) ∆ = 10 BPM
- 3. Causes of CV drift Cardiovascular drift ↑ Core Temp Sympathetic Stimulation ↓ Muscle Contractility ↓ Force of Contraction Thermoregulation ↑ Cutaneous Blood Flow Sweating Dehydration ↓ Plasma Volume ↓ Total Blood Volume ↓ End-Diastolic Volume ↓ Stroke Volume ↑ Heart Rate ↓ Central Blood Volume ↓ Ventricular filling time
- 10. Participants SCRP Research Community Recreational Runners Thesis Research Men’s Cross Country Team N= 10 Age 40.30 ± 8.27 Years Training 9.25 ± 6.97 Height (m) 1.76 ± 0.07 Weight (kg) 71.29 ± 10.76 VO 2max (ml/kg/min) 55.96 ± 5.48 Hr max (bpm) 181.9 ± 12.20 BL @ MLSS (mM/L) 2.29 ±-.95 95% MLSS (MPH) 8.44 ± 0.61 100% MLSS (MPH) 8.89 ± 0.66 105% MLSS (MPH) 9.35 ± 0.70 N= 5 Age 19.6 ± 1.14 Years Training 6.4 ± 1.14 Height (m) 1.79 ± 0.05 Weight (kg) 66.30 ± 4.44 VO 2max (ml/kg/min) 67.35 ± 2.69 Hr max (bpm) 193.20 ± 5.76 BL @ MLSS (mM/L) 1.94 ± 0.59 MLSS – 0.02 (MPH) 9.52 ± 0.61 MLSS (MPH) 9.72 ± 0.61 MLSS + 0.02 (MPH) 9.92 ± 0.61
- 16. Heart Rate *P = 3.21E-06
- 17. Heart Rate *P = 0.205777
- 18. Oxygen Consumption *P = 8.42E-13
- 19. Oxygen Consumption *P = 84.22E-08
- 20. Blood Lactate *P = 0.000124
- 21. Blood Lactate *P = 0.013788
- 27. Questions?
Editor's Notes
- Good evening, I would like to thank you for being here on behalf of myself and the other majors who presented today. I know it has been a long day, but the good news is, I’m the last presentation today! So, let’s get started!