My muscles forgot how to run

How do I know this? Because they are telling me right now, every muscle in a my body is screaming at me asking me to remind them how to run. But I can't because I have also forgotten how to run.You see I went to gym tonight for the first time in approximately 10 months (give or take a month). I usually can spend up to 25 minutes on the track, 25 on the bike and 20 on the rowing machine. Tonight, ten or less on each. Shocker. But it's a start and a positive start.