Is running up and down a hill better for you than running on the flat?

Is running up and down a hill better for you than running on the flat?

The long-running series in which readers answer other readers’ questions on subjects ranging from trivial flights of fancy to profound scientific and philosophical concepts

What has Kate Bush got to say on the matter?

Is running up and down a hill better for you than running on the flat? Or does the downhill bit being easier counteract the uphill bit? What about running down a hill and then up, when you’re already tired? Steve Henderson, Wythenshawe

Post your answers (and new questions) below or send them to nq@theguardian.com. A selection will be published next Sunday.