Textured or plain, 13 inches or 36. The right answer depends on whether your problem is a limb or a spine – and one of them costs $17.

Textured or plain, 13 inches or 36. The right answer depends on whether your problem is a limb or a spine – and one of them costs $17.

Tight hamstrings from sitting are rarely short muscles. They are protective ones – which changes how you should stretch them.

Three millimetres, five, six. The number on the box decides whether you feel balanced or bruised – here is what each one is actually for.