This is the Guardian.

Hi, my name is Jocelyn Thompson-Roll.

I'm a peloton instructor and I teach running and bootcamp classes on the peloton tread.

Don't get caught up in the amount of time that you have to spend doing something.

You don't need to do 30 minutes or 60 minutes for it to count.

Five minutes can make a big difference, even like a simple walk or a stretch or something

just to get you started. Start small and don't short-change yourself.

The Guardian Labs has partnered with peloton to help you find motivation that moves you.

To find out more, visit thegardian.com-forward-slash-motivationwith-peloton.

This message was paid for by peloton.

Welcome to the Guardian Longread, showcasing the best long-form journalism covering culture,

politics and new thinking. For the text version of this and all our long reads,

go to thegardian.com-forward-slash-long-read.

Nazi or KGB agent. My search for my grandfather's hidden past

by Linda Kinsler.

The photograph was probably taken not long before my grandfather disappeared.

The edge is uneven. Someone or something has been clipped from the picture.

What remains is an image barely more than an inch wide, just large enough to capture my grandfather's face and profile.

His hair is slicked back. His eyes squint into the sun. His lips are perched.

My father tells me it is one of the few images he has of his father, whose name is Boris.

He warns me that in it, my grandfather looks Gestapo-like.

Boris wears a long black leather jacket. He is seated on the grass in what looks to be someone's

...