How can I become agile?
Quick and light in movement ?
Stretch. Buy or make a stretching rack or use a ladder. Use bungee cord or surgical tubing for stretching exercise.
Train in gymnastics, aerobics, or free-running.
work out eat light/healthy meals make sure you get plenty of protein. Practice gymnastics etc.
Yoga and gymnastics
Try some martial art tricks
Buy leather armor from the auction house and stack agility.