Same Activity. Same Fitness?

Are these really the same bike ride?

Ride A is five minutes long with one steep hill. Ride B is thirty minutes long and mostly flat. Both are bike rides, but would they feel like the same job to your body? On the hill, every push on the pedals needs more force. On the longer ride, your legs have to repeat the same movement again and again while the rest of your body keeps going too. Calling both of them “biking” hides an important difference. The hill, the distance and how hard you are riding all change what your body has to do. That means an activity does not belong neatly to one part of fitness. The same activity can ask more for strength in one situation and more for endurance in another.

Change one thing: Take the hill out of Ride A but keep the ride five minutes long. What changed?

Can one activity use more than one part of fitness?

Climbing in a climbing gym makes this easy to see. One difficult move may take a lot of force from your arms and legs. Keep climbing and those muscles have to keep working. Keep going for longer and your breathing and heart rate rise too. Then a move may ask you to reach farther or get your hip or shoulder into a position that needs more flexibility. It is all still climbing. The mix simply changes from one part of the climb to another. That is why calling climbing a “strength activity” or an “endurance activity” tells only part of the story. Most activities use several parts of fitness at once. What changes is how much each part matters for the version of the activity you are doing.

Change the climb: Make it short and difficult. Then make it easier but much longer. What changes?

“That was hard.” Hard in what way?

A heavy bag of sand can feel hard to move. A long hill can feel hard to climb. Hanging from playground bars for a while will get hard. Getting low enough for a deep squat can feel hard too. The feeling is similar for each: Something is getting harder. But what is getting harder is different. The heavy bag needs force. Hanging on a bar demands that the muscles keep working. The hill keeps much of your body moving long enough that your heart and breathing have to keep up. The squat needs enough movement at your ankles, knees and hips. Saying something was “hard” is only the beginning. Once you ask what made it hard, the four parts of fitness start to separate again.

Sort them out: Pick two examples above. What made each one difficult?

Same activity, different goal. Does that change anything?

Two people are swimming. One wants to swim for longer without stopping. The other wants a stronger push from the wall at each turn. They are both swimming, but they are not trying to improve the same thing. Swimming longer puts more attention on cardiorespiratory endurance. A stronger push from the wall needs more muscular strength. The activity did not change. The goal did. The same thing happens outside swimming. Someone may bike because they want to handle a long ride, while someone else wants to get up a steep hill more easily. Once the goal changes, the part of fitness that matters most may change too. That matters when it is time to choose an activity for a fitness goal.

Switch the goal: Choose one activity you know. Give it two different goals. Would the same part of fitness matter most for both?

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