Does eating while walking lead to over-eating and weight gain?
A study in the UK suggests eating on the move makes you eat more, especially chocolate.
We hear from Professor Jane Ogden from the University of Surrey plus Dr Graham Easton assesses the research and the role that modern lifestyles play in the rise of obesity.
We hear about the Dutch research quantifying the decrease in death rate through regular cycling.
Dr Graham Easton takes a global perspective on the health-related pros and cons of getting more people on bikes for longer.
Following the death of Oliver Sacks, we discuss his work, and that of others, on the drug levodopa (L-dopa) in the 1960s and where it led.