Summary
This controlled laboratory study demonstrates that 14 weeks of progressive high-intensity interval training significantly attenuated age-related declines across physical, cognitive, and cardiovascular domains in aged female C57BL/6 mice. HIIT increased aerobic capacity by 71%, preserved or improved strength and motor function, enhanced executive function by 73%, and reduced systolic and mean arterial blood pressure. The intervention also reduced cardiac fibrosis and hypothalamic inflammation whilst mitigating frailty onset.
Regional applicability
This is a preclinical mouse study and does not directly translate to human populations or United Kingdom agricultural or farming systems. The findings may inform future intervention development for age-related functional decline in humans, but require validation in human clinical trials.
Key measures
Aerobic capacity (% change), four-limb strength/endurance (% decline), forelimb strength, motor function (% improvement), executive function (% improvement), systolic blood pressure (mmHg), mean arterial pressure (mmHg), cardiac fibrosis, muscle fibre type 2a percentage, IL-1β expression in hypothalamus, frailty onset
Outcomes reported
The study measured physical function (aerobic capacity, strength, motor control), cognitive function (executive function, exploratory behaviour), and cardiovascular function (blood pressure, cardiac structure) in aged female mice following 14 weeks of high-intensity interval training versus sedentary control.
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