Interesting question and as I have an opinion .... I thought I would test my theory on some willing victims.
My wife and I (40's) both focus on resistance cardio and core excercise, with cardio in between which is either running or cycling MTB. I am 5'10" and 201 lbs, wife is 5'3"and 145 lbs.
Dragged in two friends, One is a marathon runner (mid 30's, male 5'10" 152 lbs) and one gent is a power lifter and strong man competitor (mid 20's 5' 6" 310 lbs). Runner is doing marathons in around 3 hour mark and liftere placed 3rd in SA Strongman competition.
Here is the program ....... 3 rounds
- Box jumps - 30 inches hi with both feet on and step down ..... 30 reps
- D/B curls with 25lbs .... 30 reps
- Push ups ...... 30 reps
- Burpees with a B/B into push-up with a shoulder press at the end ..... 15 reps
- Romanian pike push-ups on box ........ 20 reps
- Alt D/B front and lateral raises .... 30 reps (15 front 15 lateral)
- Narrow hand push ups (thumbs touching) ...... 20 reps
- Sit-ups ... 30 reps
After round 1 ........ 2 min skipping rope
After round 2 ....... 1 mile run
After round 3 ....... 50 star jumps, 50 mountain climbs and skip 1 min.
Rest 1 min between rounds and 5sec between excercises
General observation:- My wife can do 15 push ups sets .... did two with a 5 sec rest in between. Runner has the upper body of a fly and can do 4 push ups. Power lifter laughed and did 20 so fast it was a blur and then his muscles locked up, stopped and struggled to do last 10. This happened more or less with all 3 rounds ........ various excuses used though.
Lifter failed 1/2 way through round 3 and stayed down on the mat. Runner struggeld with weights so went to only 1/2 of what my wife lifts. He managed to complete all 3 rounds. Push ups was done 5 each round.
2 days later ..... lifter is threatening me with death if I ever get him involved with such stupidity. He is hurting all over and stiff as hell. He thinks we are crazy and told me he nearly puked. Runner is sore all over upper body and accepts my wife will kick his @ss if she wants to

Wife and I were back for some more pain yesterday and today.
Think all comes down to a balance. Power and muscles for what you need to do. Having big muscles (guess steroids in this case) is useless when reps exceeds 12 reps. Lung capacity is insufficient to provide oxygen and muscle endurance is zero. Lactic acid a real probloem with lifter on higher reps. Runner has massive lung capacity but just about zero strength. If you escape by running away, he is good to go but then he busted.
YMMV but this is how it is in Africa
Aubrey