When an extensive study was done in Taiwan on 4,20,000 randomly selected adults (men and women) for 10 years, it was found that compared with individuals in a totally inactive control group, those in the low-volume activity group, (who exercised for an average of 92 minutes per week) had a 14 per cent reduced risk of all-cause mortality and a three year longer life expectancy. Every additional 15 minutes of daily exercise beyond the minimum amount of 15 minutes a day further reduced all-cause mortality by 4 per cent and all-cancer mortality by 1 per cent. These benefits were applicable to all age groups and both sexes. So the minimum required is probably 15 minutes a day (90 minutes a week) of moderate-intensity exercise.
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Source: Published in The Telegraph ( Kolkata, India)
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