You might be interested in these older questions:
https://www.reddit.com/r/AskHistorians/comments/4gi0rs/how_did_medieval_urban_militias_maintain_training/
https://www.reddit.com/r/AskHistorians/comments/2t2tn8/did_medieval_knights_receive_much_training_in/
https://www.reddit.com/r/AskHistorians/comments/2h2kwv/did_medieval_exercise_include_pushups_or_situps/