The two extremes make sense when looking at both ends of the energy continuum. They clearly show the opposite ends of certain qualities and abilities, such as:
- A short sprint vs. an ultra-distance run
- Immediate energy output vs. long-sustained energy output
- Fast speed vs. slow speed
- Maximum muscular contraction vs. complete muscular relaxation
- High intensity vs. low intensity effort
- Simple skills: 50 burpees or 200 mountain climbers. No external resistance is used and thus a lessened risk of injury.
- Complex skills: 20 barbell hang cleans to push press with 50% of your one repetition maximum or 15 one-arm kettlebell clean-squat-presses with significant resistance.