Implications of systolic and diastolic blood pressure in regard to isometric and isotonic contraction
Systolic BP normal level
Diastolic BP normal level
VIEW
< 120 mmHg
< 80 mmHg
Results - participants data illustrated through graphics
Methods
Introduction
The aim is this study is to explore "How do isometric and isotonic contractions may affect systolic and diastolic blood pressure".Systolic blood pressure is the force exerted on the blood vessels’ walls when the heart contracts. Diastolic blood pressure is the force exerted on the blood vessels’ walls when the heart relaxes. Both contractions are related as SBP is the maximum blood pressure occurred during heart contraction and DBP is the minimum pressure recorded just prior to the next systolic contraction, meaning it is a constant repetitive process. Furthermore, note that isometric contraction occurs when muscles contracted do not change notably regarding length and joints do not perform any type of movement. However, isotonic contraction occurs when there movement of the joints and muscles resist body weight. In this experiment, subjects will perform a "wall seat" as isometric contraction and "squat" series as isotonic contraction.The results expected are to notice a variation of SBP and DBP patterns when performing the two different isometric and isotonic contraction exercises. Study that supports the results expected: Effect of sustained isometric and isotonic exercises on blood pressure and heart rate variability – A comparative study | Journal of pharmaceutical research international. (2021, November 5). Journal of Pharmaceutical Research International. The importance of this study is to further undestand, academically, trough a real experiment, how systolic and diastolic BP are affected by isometric and istononic contractions.
5 subjects are going to participate in a repeated measures design (each subject is exposed to both conditions - both contraction exercises. Day 1: Isometric contraction ("wall seat") Day 2: Isotonic contraction ("squats") A sphygmomanometer (measuring instrument) will be used to record SBP, DBP and HR (heart rate) before, during and after each exercice. Exercises will be performed until fatigue/maximum HR of 180 bpm. Before exercises, BP and HR will be measured 1 time. During, variables are going to me measured a minimum of 2 times. Right after ending the exercise, variables will be measured again.
Discussion
Results could be uncertain due to: low number of subjects (5) and sphygmomanometer provided some error results; therefore, averages can be disrupted. Comparing isometric and isotonic SBP/DBP "post-exercise results": isometric - SBP oscillated around 188.00 mmHg and DBP around 119.00 mmHg, isotonic - SBP oscillated around 113.50 mmHg and DBP around 105.50 mmHg. The results suggest that there is a difference between BP and both contractions. While performing isometric contraction exercises, both SBP and DBP increase, meaning that our body requires higher oxygen in the muscles, so cardiovascular blood flow (pressure) increases to satisfy the body's demands.
Conclusion
Based on the data analysis results (graphs), we can confirm that there is an existing relationship between isometric and isotonic contractions in relationship to systolic and diastolic blood pressures. When performing isometric contraction exercises, the SBP increases by 26.86% and the DBP by 39.67% while in isotonic contraction exercises the SBP increases by 1.04% and the DBP by 33.54%. Although in isotonic contraction exercises there is an increase in BP as well, we can infer that our muscles demand higher oxygen levels while performing isometric contraction exercises. Therefore, in comparison to isometric contraction, BP levels are higher in isometric contraction.
Isometric and isotonic contraction
Sara SUÑÉ
Created on November 29, 2023
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Transcript
Implications of systolic and diastolic blood pressure in regard to isometric and isotonic contraction
Systolic BP normal level
Diastolic BP normal level
VIEW
< 120 mmHg
< 80 mmHg
Results - participants data illustrated through graphics
Methods
Introduction
The aim is this study is to explore "How do isometric and isotonic contractions may affect systolic and diastolic blood pressure".Systolic blood pressure is the force exerted on the blood vessels’ walls when the heart contracts. Diastolic blood pressure is the force exerted on the blood vessels’ walls when the heart relaxes. Both contractions are related as SBP is the maximum blood pressure occurred during heart contraction and DBP is the minimum pressure recorded just prior to the next systolic contraction, meaning it is a constant repetitive process. Furthermore, note that isometric contraction occurs when muscles contracted do not change notably regarding length and joints do not perform any type of movement. However, isotonic contraction occurs when there movement of the joints and muscles resist body weight. In this experiment, subjects will perform a "wall seat" as isometric contraction and "squat" series as isotonic contraction.The results expected are to notice a variation of SBP and DBP patterns when performing the two different isometric and isotonic contraction exercises. Study that supports the results expected: Effect of sustained isometric and isotonic exercises on blood pressure and heart rate variability – A comparative study | Journal of pharmaceutical research international. (2021, November 5). Journal of Pharmaceutical Research International. The importance of this study is to further undestand, academically, trough a real experiment, how systolic and diastolic BP are affected by isometric and istononic contractions.
5 subjects are going to participate in a repeated measures design (each subject is exposed to both conditions - both contraction exercises. Day 1: Isometric contraction ("wall seat") Day 2: Isotonic contraction ("squats") A sphygmomanometer (measuring instrument) will be used to record SBP, DBP and HR (heart rate) before, during and after each exercice. Exercises will be performed until fatigue/maximum HR of 180 bpm. Before exercises, BP and HR will be measured 1 time. During, variables are going to me measured a minimum of 2 times. Right after ending the exercise, variables will be measured again.
Discussion
Results could be uncertain due to: low number of subjects (5) and sphygmomanometer provided some error results; therefore, averages can be disrupted. Comparing isometric and isotonic SBP/DBP "post-exercise results": isometric - SBP oscillated around 188.00 mmHg and DBP around 119.00 mmHg, isotonic - SBP oscillated around 113.50 mmHg and DBP around 105.50 mmHg. The results suggest that there is a difference between BP and both contractions. While performing isometric contraction exercises, both SBP and DBP increase, meaning that our body requires higher oxygen in the muscles, so cardiovascular blood flow (pressure) increases to satisfy the body's demands.
Conclusion
Based on the data analysis results (graphs), we can confirm that there is an existing relationship between isometric and isotonic contractions in relationship to systolic and diastolic blood pressures. When performing isometric contraction exercises, the SBP increases by 26.86% and the DBP by 39.67% while in isotonic contraction exercises the SBP increases by 1.04% and the DBP by 33.54%. Although in isotonic contraction exercises there is an increase in BP as well, we can infer that our muscles demand higher oxygen levels while performing isometric contraction exercises. Therefore, in comparison to isometric contraction, BP levels are higher in isometric contraction.