I'd like to talk about indoor bouldering, which is a form of rock climbing that has really taken off among young people across the country over the last few years. It's essentially climbing relatively low artificial walls without ropes, using thick safety mats on the floor to cushion any falls.
People usually head to purpose-built climbing centres, which have sprung up in converted warehouses and commercial parks around most major cities. You tend to see university students and young professionals flocking there on weekday evenings after work, or during rainy weekend afternoons when outdoor sports aren't really practical. Most people go along with a group of friends or flatmates, though it's actually quite normal to turn up alone because the climbing community is remarkably friendly, and people readily strike up conversations while resting between attempts.
As for why it has become such a massive trend, I think it offers a brilliant combination of physical exercise and mental engagement. Unlike running on a treadmill, which can be dreadfully monotonous, bouldering feels like solving physical puzzles with your body. Each route is literally called a 'problem', and you have to work out the exact sequence of body movements needed to reach the top hold.
On top of that, it provides a much-needed digital detox. When you're clinging to a wall with your fingertips, you can't really be checking notifications on your mobile phone. It completely clears your mind from university deadlines or workplace stress, leaving you feeling genuinely refreshed despite being physically exhausted.