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Exercise and Cardiovascular Response01:20

Exercise and Cardiovascular Response

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Exercise significantly impacts cardiovascular response, which is crucial for understanding patient health and designing effective treatment plans.
Light to moderate physical activity initiates a series of interconnected responses in the body. The heart rate modestly increases in anticipation of the workout, followed by widespread vasodilation as oxygen consumption by skeletal muscles increases. This results in decreased peripheral resistance, increased capillary blood flow, and accelerated...
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Regular physical activity is essential for maintaining cardiovascular health, with aerobic exercises being particularly effective. According to the American Heart Association, 150 minutes of moderate to intense aerobic exercise per week is recommended for a healthy heart. Aerobic activities may include brisk walking, running, bicycling, cross-country skiing, and swimming, ideally performed three to five times per week.
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Exercise induces a range of adaptations in muscle tissue, depending on the type and duration of activity. Such physical training can be broadly categorized into two types: endurance exercises and resistance exercises.
Endurance exercises
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Several factors can increase the risk of cancer in an individual. About 50% of cancer cases can be prevented by adopting a healthy lifestyle, regular exercise, eating healthy, and following a modest cancer prevention diet. Epidemiological studies have consistently shown that populations with vegetable and fruit-rich diets have reduced the incidence of cancer. On the other hand, populations who have a diet rich in animal fat, red meat, junk food, or high calories are predisposed to cancer.
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Related Experiment Video

Updated: Dec 6, 2025

Conducting Maximal and Submaximal Endurance Exercise Testing to Measure Physiological and Biological Responses to Acute Exercise in Humans
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Increased Duration of Exercise Decreases Rate of Nonresponse to Exercise but May Not Decrease Risk for Cancer

Dan Lin1, Melanie Potiaumpai, Kathryn Schmitz

  • 1Department of Public Health Sciences, Pennsylvania State University College of Medicine, Hershey, PA.

Medicine and Science in Sports and Exercise
|October 12, 2020
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Summary

Increasing exercise volume, not intensity, reduces the number of exercise non-responders in women at high risk for breast cancer. A minimum of 150 minutes of exercise per week appears sufficient to lower cancer mortality risk.

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Area of Science:

  • Exercise physiology
  • Cancer prevention
  • Genetics

Background:

  • Previous research indicates an inverse relationship between physical activity and breast cancer risk.
  • Individual responses to exercise interventions vary significantly.
  • This study focuses on women with a genetic predisposition to breast cancer.

Purpose of the Study:

  • To determine if increasing aerobic exercise volume (150 or 300 min/week) at a constant intensity (70%-80% HRmax) reduces exercise non-responders.
  • To assess the impact of higher exercise doses on the risk of cancer mortality in genetically predisposed women.

Main Methods:

  • Randomized controlled trial involving premenopausal women at elevated breast cancer risk.
  • Three groups: control (<75 min/week), low-dose (150 min/week), and high-dose (300 min/week) aerobic exercise for 6 months.
  • Clinical effectiveness (CE) defined by V˙O2max improvement; assessed non-responders, adherence, and cancer mortality risk.

Main Results:

  • Higher exercise volume significantly decreased the percentage of clinical non-responders (23.5% in low-dose vs. 5.6% in high-dose, P=0.04).
  • Non-responder status was independent of exercise adherence.
  • Significant reductions in predicted cancer mortality risk were observed in both low-dose (87.2%) and high-dose (94.9%) groups.

Conclusions:

  • Increasing exercise volume, rather than intensity, is key to reducing exercise non-responders.
  • Some individuals remain "true non-responders" despite high adherence.
  • 150 min/week of exercise is likely sufficient to decrease predicted cancer mortality risk in this population.