Veteran indoor climber Louis Parkinson has released a new video featuring a session at the Boardroom, a gym with the highest boulder wall in the U.K.

Measuring around 25 feet, it’s become a popular feature for climbers to practice climbing highball heights relatively safely. Parkinson wears a heartrate monitor so we can follow along with how his stress levels are doing.

A few years ago, U.K. climbing coach Pete Edwards shared his thoughts on what makes a highball a highball versus a free-solo, read the story here.

Boardroom Highball