Harold Winslow

Vigor

Modern people get much too fixated on particular forms of fitness - people become runners, or lifters, or whatever, rather than attempting to become or remain good overall athletes. This is a major mistake, as it does not attain the ideals of either form or function. Take a look at these photos:

Bathurst_Island_men

doryphorus

Kevin_Mayer

The first men are modern Australian aboriginals. The statue is Doryphoros, an ancient Greek attempt at depicting the ideal human proportions. And the third photo is of decathlon world record holder Kevin Mayer. As you can see, all are solidly built - sturdy enough to fight or carry heavy objects, but not so heavy or muscled that they can't run, jump, or climb well.

Functionally, they could probably meet many of the following standards (chosen for relevance to modern life):

To look like and perform like them, you certainly need to do some strength and conditioning, and methods for those are well documented. But to stay injury-free and well balanced, I think the average person needs much more variety of movement than you'll see in a typical strength and conditioning routine. Think of all the ways you'd move in a dance, yoga, or martial arts class that you don't otherwise do. If you're not in a class like that, you can deliberately add in some variety. Some examples:

Also, you need to evade the common injuries that occur when falling or changing direction at high speed. You can avoid these by slacklining, doing single-leg jumps in all directions, and doing agility drills with cones or ladders.