Pump bike
Yep 24” BMX bike will do the job... just remember the smaller the wheel the faster everything reacts (good and bad). So if you still have cat like reflexes grab a 20” BMX they work a treat on an asphalt Pumptrack but if you’re slowing a a bit, go for the 26” hardtail. Just make sure it has really good standover (low top tube ). Either way you will have a blast and get super fit ... they smash you