Keentune
Adaptive skill practice — find your level, get sharper.
Exercise Science practice
How the body trains, adapts, and performs
The science of how the body trains, adapts, and performs — the energy systems (ATP-PC, glycolytic, aerobic) and which fuels which effort, muscle physiology (fiber types, the contraction, how hypertrophy actually happens), the cardiorespiratory response and VO2 max, the training principles that drive results (progressive overload, specificity, recovery, periodization), the biomechanics of movement, and the basics of sports nutrition and thermoregulation. Every explanation names the persistent myth (spot reduction, "lactic acid causes next-day soreness," muscle "turning to fat") and leaves a rule. Absorbs sports science. Educational only — general exercise science, not a personalized training or medical program.
• Meets you at your level — never too easy, never too hard.
• Adapts every question to how you’re doing.
• Tracks your level over time. Skill practice, not a test.
Explore all skills on Keentune
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