Nike is suing Lululemon claiming patent infringement. The case surrounds Lululemon's Mirror, a home exercise device that guides users through various routines. Nike says that it filed a number of patents back in 1983 for device that tracked user's calorie expenditure, distance run, and more—all of which are infringed upon by Lululemon's Mirror. 

• “The patents in question are overly broad and invalid. We are confident in our position and look forward to defending it in court,” a spokesperson for Lululemon said, according to CNBC.

Lululemon Is Also Suing

If Lululemon and Peloton are competing over at-home training equipment, they're also fighting over apparel. As The Hustle states, Lululemon says Peloton copied various sports bras and leggings, which the fitness bike maker then turned around and countersued Lululemon for.

The Verdict

Seems like Nike is late to the at-home exercise device boom that Peloton, Tonal, and now Lululemon have cashed in on, so their next best strategy is to sue the competition.