This is a weird, brief (but interesting) mini-pod. You might like it. A study published in the Journal of Experimental Biology found that walking on soft sand expends approximately 2.1 to 2.7 times more energy expenditure than walking at the same speed on a firm surface. In simple terms, 81kg me (Harps) walking for an hour on a hard surface at 5 kph would burn about 280 calories, compared with me doing the same thing on soft sand (same activity, same speed, same time, same body) and potentially, burning up to 756 calories (2.7X)! I get a little exercise geeky in this ep, but the idea (changing one variable) is also useful for a range of other non-exercise applications. Enjoy

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