You need to be in great shape to be a bodyguard, simple as that. No agency or client would ever hire an overweight, out of shape or weak bodyguard to provide personal protection. Strength, stamina, agility, and fast defensive reflexes are basic requirements for anyone in this industry.
A lot of former military and L.E. ( law enforcement) professionals get into the executive protection industry and are sometimes shocked at the physical demands if they’ve let themselves go a little bit. A special forces soldier or Navy SEAL won’t break a sweat, but your average police officer or infantryman might be surprised at the pace of an elite bodyguard out in the field.