Exercise can reduce weight but only if you do a lot

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Adapted from BMJ 22 Feb 2025

We are often told that diet is the key to fat loss and that exercise doesn’t play much of a part in this.

However, a meta-analysis of 116 clinical studies shows that notable improvements in waist circumference and other measures of body fat only occurred when moderate or high intensity aerobic exercise was done for more than 150 minutes per week.

A reduction on one kilogram in body weight is roughly equivalent to a deficit of 8,000 calories. This is a lot more difficult to burn off than most people realise.

My comment: I easily meet the 150 minutes or more of exercise a week but this is mixed exercise and comprises of low impact aerobics, resistance training, stretching, and balance and co-ordination exercise. I’ll need to stick to diet myself.

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