Calisthenics at Fisticuffs Guilde
Jumping jacks, dips, Pull ups, chin ups, ...repeat many times.
Get fit, get trained, be a harder target than they think you are.
Calisthenics is very important. Moving your blood efficiently is vital to health and security. No one can fight if they are too tired or too weak.
Use the same exercises that the military has used for generations to create the greatest fighting force known to man. The American Military.