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Why the Start of a Run Feels Hard
Watch on YouTube 📺
Why the Start of a Run Feels Hard
Do you ever feel like giving up during the first ten minutes of a run?
Exercise scientists say this intense struggle is completely normal.
The moment you start running, your muscles demand instant energy.
However, the system that makes energy from oxygen cannot react immediately.
Because of this gap, your body must pass through three distinct phases.
First, your heart rate rises quickly, and blood moves toward your legs.
Breathing feels unusually hard as your body struggles to supply more oxygen.
In the second phase, your muscles begin aerobic production
while using up fuel stored inside them.
Finally, after 10 to 15 minutes, oxygen supply and demand balance out.
Your body reaches a calm steady state,
and running suddenly feels much smoother.
Experts say you shouldn't worry or assume you are out of shape.
To make your runs easier, try a gradual warm-up like brisk walking or slow jogging.
Starting slightly slower than your target pace also gives your lungs time to adjust.
Quiz 🧠
Q1. Feeling tired during the first ten minutes of a run is completely normal.
Show answer
✅ True
The body needs about ten minutes to balance oxygen supply with muscle demand.
Q2. What does 'steady' mean in 'a steady pace'?
Show answer
✅ regular and smooth
'Steady' describes something that stays calm, even, and regular without sudden changes.
Q3. Why should a runner start their workout at a slow pace?
Show answer
✅ To help the body adjust
Starting slowly gives your heart and lungs enough time to supply oxygen to your working muscles.
Dialogue 🎧
Alex: Emma, every time I start running, I want to quit after five minutes.
Alex: I thought I was just terribly out of shape.
Emma: You're not!
Emma: Science says that intense struggle during the first ten minutes is completely normal.
Alex: Normal? My lungs feel like they're on fire! Why does it hurt so much?
Emma: Your muscles demand instant energy.
Emma: But your oxygen system cannot react immediately. There's a delay.
Alex: So my muscles are throwing a tantrum while waiting for oxygen?
Emma: Pretty much!
Emma: Your body actually has to pass through three distinct phases to catch up.
Alex: Three phases? What's the first one, pure panic?
Emma: Your heart rate jumps, and blood rushes to your legs. Breathing feels unusually hard.
Alex: Oh, I know that feeling. Heavy legs, gasping for air. Then what happens?
Emma: Phase two! Your muscles use up stored fuel and slowly kickstart aerobic energy production.
Alex: And does the torture ever stop?
Emma: Yes! After ten to fifteen minutes, oxygen supply and demand balance out.
Alex: Wait, so it actually gets easier if you just don't quit?
Emma: It does. You hit a calm steady state, and running suddenly feels much smoother.
Alex: Wow. I always gave up right before the magic happened.
Emma: To make it easier, try a gradual warm-up first.
Emma: Brisk walking or slow jogging really helps.
Alex: Or maybe I should just start slower than my target pace.
Emma: Exactly. Give your lungs time to adjust, and be kind to yourself.