are you sure?
長跑之後,my knee feel pain too... so it is bad?
how every, I improve the distance within a short period... so not sure it is right or not. Before, I run 3K only, but within 2 weeks .. extend to 10k... but the process is painful...
I am not sure... but I did it...and no pain now
maybe it is different from taiji la... it just a opinion