Canfit EP
11 Mar 2026
High shear stress generated during exercise, can physically destroy circulating tumor cells (CTCs) and prevent metastasis, according to research studies performed by Universities in Macau and Singapore. Studies indicate that this high-intensity physical stress induces decay of up to 90% of CTCs within 4 hours, offering a non-pharmacological, targeted method to reduce cancer metastasis.
Key Findings on Exercise and Cancer Control:
Mechanisms of Action: High shear stress (or intense exercise) disrupts the cytoskeleton of CTCs. This reduces their ability to adhere and trigger healthy cell death. This process is highly specific to cancer cells, with minimal impact on white blood cells.
Mortality Reduction: Epidemiological studies have shown that consistent exercise can lead to significant reductions in cancer mortality, with some findings indicating up to a 37% reduction in mortality compared to sedentary lifestyles.
Improved Survival Rates: Research indicates that structured exercise programs can improve long-term survival, with one study showing 90% of participants in a high-intensity group surviving compared to 83% in a control group.
Reduced Metastasis: Beyond mechanical destruction, exercise improves immune cell function (e.g., increased natural killer cells) and reduces metabolic energy available to tumors, reducing metastasis risk by up to 72% in some models.
Implications for Cancer Care
The findings suggest that incorporating high-intensity exercise into patient routines could serve as a valuable, low-cost, and non-toxic adjuvant therapy to conventional cancer treatments.
Exercise to Achieve High Shear Stress
To maximize vascular health benefits, high-intensity exercise is necessary to generate sufficient shear stress on the vessel walls. Moderate activities like walking do not provide the necessary force. Ensure you consult your doctor or Exercise Physiologist before attempting strenuous exercise.
Key Recommendations:
Intensity: Aim for vigorous activities (running, cycling, rowing, swimming, HIIT) that push your heart rate to 70–85% of your maximum.
Target Calculation: Calculate your max HR as 220 minus your age. For a 40-year-old, this is a 180 bpm max, with a target range of 126–153 bpm sustained.
Frequency & Duration: Perform 3–5 sessions per week, with each session lasting 30–60 minutes.
Cancer Treatment Guidelines: While exercise is generally safe and beneficial during most chemotherapy regimens, individuals in active treatment must coordinate with their oncologist and execise physiologist to tailor the intensity appropriately.
High-intensity exercise provides superior increases in cardiorespiratory fitness compared to moderate, continuous training.