American sportswear and sports accessories manufacturer Under Armour (UA) is investing US$1bn (£811m; €935.5m) in health and fitness technology, according to the company's founder and chief executive officer.

Speaking during his keynote speech at the Consumer Electronics Show (CES) in Las Vegas, Nevada this month, Kevin Plank said UA was innovating by putting technology front and centre of the company.

Plank unveiled three models of the company’s Record Equipped shoes, which give performance feedback based on workouts. Michael Phelps, the most decorated Olympian of all-time, joined Plank on stage to demonstrate the shoes and talk about UA Healthbox, powered by UA Record, the world’s first connected fitness system.

The keynote also included the unveiling of a line of sleep apparel, dubbed Rest Win Repeat, in collaboration with New England Patriot’s quarterback Tom Brady, designed to rebuild the body while it rests through infrared technology.

The event, which was celebrating its 50th anniversary, showcased latest emerging innovation across major industries, including automotive, sports and fitness, software, healthcare and entertainment.

More than 3,800 companies launched products at the show. Fitness gadgets that were showcased at the event included:

- Motiv fitness tracking ring: a waterproof ring that counts steps, tracks sleep, and monitors heart rates.

- QardioCore wearable ECG monitor: a chest strap that records heart rate, respiratory rate, and activity and transfers the data to the user's smartphone.

- Polar team pro shirt: Targeted at athletes, this sleeveless, base-layer shirt combines GPS tracking and heart rate technology, allowing real-time data to be broadcasted directly to an iPad. Lightweight sensors are placed in a small pocket in the shirt collar to track an athlete’s distance, acceleration, and speed.