Question of the Week, from the Naked Scientists

John writes in wondering whether the 10,000 steps rule applies eqully to everyone, given the range of body types and fitness among the population. James Tytko wondered where the 10,000 number came from in the first place, and sought an answer to John's question with the help of Dr Raj Amarnani, Consultant in Sport, Exercise and Muscoskeletel Medicine... Like this podcast? Please help us by supporting the Naked Scientists

This time on Question of the Week, James Tytko is being given a mental work-out thanks to this listener question on muscle fatigue. We learn about the biological reactions which govern intense exercise from Andy Jones, Professor of Applied Physiology at the University of Exeter... Like this podcast? Please help us by supporting the Naked Scientists

Listener Krzysztof has written in to ask how skin is protected from potentially harmful UV radiation by sun cream products. To help him with the answer, James Tytko put in a call to Antony Young, Emeritus Professor of Experimental Photobiology at King's College London... Like this podcast? Please help us by supporting the Naked Scientists

Ian from Stockport has had a thought. If heat pumps transfer thermal energy from outside into our homes, will they counteract the relative heat of urban areas compared to the countryside? To get to the bottom of this energy enquiry, James Tytko asked for the expertise of Professor Bob Critoph, from the University of Warwick's School of Engineering. Like this podcast? Please help us by supporting the Naked Scientists

Bhavesh wants to know how guided missiles find their target. James Tytko took on his question with help from Dr David Galvao Wall, Head of the Air Platforms and Weapons Group at Cranfield University... Like this podcast? Please help us by supporting the Naked Scientists