Parmadillo Marshmallow
Member
How do you help defend a gym? I'm only given the option to train.
Unfortunately you can't actively defend a gym. The best I've been able to do consistently is get +500 prestige per training session. Attackers can knock off 2000-3000 prestige per attack session. So at that rate it's impossible to keep up unless you have 4-6 active defenders for each active attacker.
Personally I wish they made it a lot harder to attack gyms. As in, impossible or close to impossible if you don't have a Pokemon within a close CP range of the gym leader. As it is, you can easily take any gym even if the gym leader's CP is way over your best CP. Pretty lame IMO.