At age 40, I played raquet ball with guys 1/2 my age and usually won. I worked out every day and went to the range 3 times a week...minimum.
At age 55, I was the second oldest guy in my U.S. Govt. LEO class and finished top of my class in everything from academics to marksmanship to hand to hand combat. I was in better physical shape than when I played high school and college sports.
I was physically active, took care of myself, considered myself an adventurer, a sports enthusiast, and oh, did I mention that during the previous 35 years I managed to get shot 6 times but bounced back because of a little bit of luck and lot of being in good physical condition.
At age 58, while riding on a bus, the driver pulled a bonehead move which left me with a severe spinal cord injury. The point is that you never know what is around the corner and it could happen to you when you least expect it.
I fought for 6 years to get back on my feet (figuratively speaking) so I could once again master my sport of shooting. As before, I carry a gun nearly 24/7 but now a physical confrontation could mean serious permanent bodily damage or worse. My gun is my line of defense and I pray each day that I will never have to use it.
Life can change in an instant. Live it. Enjoy it. Protect it. Don't let some half wit goad you into a confrontation that could only result in a negative outcome for you, regardless of how much king of the mountain you may think you are.