Bouldering improves your upper body strength by activating your forearms, back, and core muscles at the same time. One session easily burns between 8-10 calories per minute while climbing and builds your grip strength enough to carry into your everyday physical tasks.
If you ever plan on giving this a try, modern indoor climbing facilities allow newcomers to rent basic climbing shoes and gear at the front desk. Helpful staff members are available to walk beginners through the safety basics, and if you find yourself really getting into the sport, there are niche online stores available to discover new outdoor climbing gear.
Changing from your usual gym practice to outdoor sports adds physical variety to your routine that your body benefits from. This includes engaging your core muscles beyond workout machines, and it gives you a reason to check the weather each morning and engage with nature.