DDX Fitness, a Russian fitness club chain, is investigating a suspected cyberattack after customer data was reportedly leaked online. The exposed information allegedly includes customer photos, visit dates and times, number of visits, purchase data, and club addresses. The company says it has strengthened its information-security measures and taken additional steps to protect its databases and systems. The incident is particularly notable because DDX Fitness recently introduced an AI Trainer feature in its mobile app, which includes body-composition analysis, workout tracking, and online training. Bottom line: A suspected data breach may have exposed sensitive customer information from DDX Fitness, while the company investigates the incident and reinforces its security.