Lululemon's CEO Calvin McDonald will leave the athleisure retailer at the end of January as sales in its largest market sag and consumers flee to competitors.

Lululemon's CEO Calvin McDonald will leave the athleisure retailer at the end of January as sales in its largest market sag and consumers flee to competitors.

Calvin McDonald's decision to leave at the end of January comes amid a run of poor sales for the firm in the US.