Try indoor rock climbing or bouldering.

“After about 15 minutes of climbing, my forearms felt like they were filled with concrete. Not sore - literally unable to grip anything. I couldn't open my water bottle. This is called getting "pumped" and it happens to EVERYONE their first time. Your forearms aren't used to sustained gripping, and climbing demands it constantly. The good news: This adapts crazy fast. By week three, I could climb for an hour without turning into a T-rex. Your body figures it out quickly.”

“It is safe to say that I am no Bouldering expert and still have a lot to learn, but please know that Bouldering is not easy, and it will take a few sessions to get into the swing of things. [...] Most first-timers can happily climb for around 1 hour. After that time, they will start fatiguing, and their hands will be worn out and sometimes a little sore, especially if the grips are either small or abrasive if new. Sometimes the skin on your hands can become thin and get blisters. After several visits, your hands start to stiffen, the skin hardens, and your body can endure more, so a climbing session takes about 2-3 hours.”