A Time for Every Effort: What Ecclesiastes 3 and the Science of Perceived Exertion Reveal About Every Athlete in Raleigh Chasing Max Effort Every Day
"For everything there is a season, and a time for every matter under heaven." — Ecclesiastes 3:1
Solomon wrote that as a meditation on the rhythm built into all of life — a time to plant and a time to harvest, a time to break down and a time to build up. It wasn't a call to do everything at once, or to treat every day the same. It was an observation that wisdom means matching your effort to the moment.
Most athletes never apply that principle to their own training. They show up and try to go hard, every day, because "hard" feels like the only setting that counts as real work. Exercise science has spent the last few decades proving that instinct wrong.
A Scale for What the Body Already Knows
In the 1970s, Swedish researcher Gunnar Borg developed a simple tool that's still used in performance labs and gyms today: the Rate of Perceived Exertion (RPE) scale. Instead of relying only on external numbers like heart rate or pace, Borg's scale asks the athlete a direct question — how hard does this actually feel, right now, in your body?
That question matters more than it seems. Two athletes can hit the exact same heart rate on two different days and experience completely different levels of strain, depending on sleep, stress, and recovery. RPE captures something a stopwatch can't: the body's own honest report of what it's carrying that day.
The Data Behind Easy Days
Norwegian exercise physiologist Stephen Seiler spent years studying how the world's best endurance athletes — Olympic rowers, cross-country skiers, elite runners — actually structured their training. What he found surprised almost everyone outside that world: across sport after sport, elite athletes spent roughly 80% of their training time at genuinely low intensity, and only around 20% at high intensity. Very little time was spent in between.
This became known as polarized training, and it wasn't a theory Seiler invented — it was a pattern he observed already happening among the most successful athletes on earth, independent of country or coach. A later randomized trial by researchers Stöggl and Sperlich tested this directly against threshold-focused and high-volume training blocks, and the polarized approach produced the largest gains in aerobic capacity and time to exhaustion.
The uncomfortable implication for the rest of us: most people who train hard every day aren't training like elite athletes. They're training like people who haven't learned to rest on purpose.
Why "Medium" Is the Trap
Here's the part that surprises people most. The real danger zone isn't the easy day or the hard day — it's the middle. Coaches who study this call it the "grey zone": a pace that feels productive because it's uncomfortable, but isn't quite hard enough to force real adaptation. It accumulates fatigue faster than it builds fitness. It feels like training. It mostly just tires you out.
This is why the instinct to make every day a medium-hard grind is often the worst of both worlds — too easy to drive real adaptation, too hard to actually recover from. True easy days and true hard days each do a job the grey zone can't.
A Season for Every Rep
Solomon's point in Ecclesiastes wasn't that all seasons are equal — it's that each one has its purpose, and wisdom is knowing which season you're in. A time to plant is not a time to harvest. A time to build up is not a time to break down.
Training works the same way. A hard day builds the capacity that makes you better. An easy day is what lets that capacity actually take hold. A day spent stuck in the middle does neither well. Treating every single day like it needs to be your hardest effort isn't discipline — it's actually a failure to discern what today's training is supposed to accomplish.
The Application
Use your RPE honestly. A hard day should actually feel hard — an 8, 9, or 10 out of 10. An easy day should actually feel easy — closer to a 3 or 4. If every day feels like a 6 or 7, you're likely living in the grey zone that builds fatigue without building fitness.
Don't treat rest or easy effort as wasted time. The data on elite athletes is clear — the volume of easy work is what makes the hard work productive, not the other way around.
Learn to discern your season. Some days call for everything you have. Some call for genuine restraint. Wisdom is knowing which day you're in, not defaulting to maximum effort out of fear that anything less doesn't count.
Trust that sustainability and intensity aren't in conflict. The athletes who last — in training and in life — aren't the ones who never ease off. They're the ones who know there's a time for every effort, and who have the discipline to actually honor it.
Training is the path. Christ is the destination.
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