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Knee joint beside a magnified illustration of layered soft tissue.

Flexibility Matters Even More as You Age

Flexibility can decline unevenly with age, making enough joint movement for everyday tasks more useful than seeking the greatest possible range.

Circular illustrations of lungs, weights, fat cells, muscle, and a flowing curve.

What Makes Up Health-Related Fitness?

Health-related fitness describes several distinct qualities, so strength in one area does not necessarily mean equal ability across the others.

Walking figure beside a kettlebell and rolled exercise mat.

Physical Activity vs. Exercise: What’s the Difference?

Physical activity includes everyday movement that uses energy, while exercise adds planned, structured repetition to improve or maintain fitness.