One Week of Garmin Coach Half Marathon Training After 40: What I Learned

Today, I did not run.

I only took a light walk.

After several days of running, Garmin Coach workouts, drill sessions, and run-walk training, walking felt like the right choice. At first, it almost felt like doing less. But when I looked back at the past week, I realized that recovery is also part of training.

This week was an important one for me.

I am a beginner runner in my 40s, and I recently started a Garmin Coach half marathon training plan with Coach Jeff. The plan ends on November 15, and the half marathon distance still feels far away.

But this week helped me understand something.

Half marathon training is not built from one big run.

It is built from many small sessions.

Easy runs.
Drill workouts.
Run-walk sessions.
Recovery days.
And days when I simply choose to keep going.

Here is my running data from the past week.

Date	Workout	Distance	Time	Average Pace	Average Heart Rate
July 5	Easy / Recovery Run	3.56 km	30:01	8:26/km	116 bpm
July 6	Drill Workout + Continued Run	10.21 km	1:00:00	5:52/km	144 bpm
July 7	Easy Run	4.48 km	30:00	6:42/km	129 bpm
July 8	Drill Workout	5.01 km	30:48	6:09/km	136 bpm
July 9	Run-Walk Interval Experiment	5.15 km	30:01	5:50/km	145 bpm
July 10	Run Walk Run Workout	10.06 km	1:05:26	6:30/km	136 bpm
Total	6 Runs	38.47 km	4:06:16	6:24/km	About 136 bpm

The total distance was 38.47 km.

The total running time was 4 hours, 6 minutes, and 16 seconds.

When I look at those numbers, I feel a little surprised.

Each day did not feel huge by itself.

Some runs were only 30 minutes.
Some workouts felt confusing.
Some runs were slow.
Some sessions were not part of a dramatic story.

But together, they became a real week of training.

That is one thing Garmin data helps me see.

Small sessions add up.

July 5: A Very Easy Run

The week started with a very easy 30-minute run.

I ran 3.56 km at an 8:26/km average pace, with an average heart rate of 116 bpm.

It was not fast.

It was not hard.

But it was useful.

That run reminded me that recovery runs matter. As a runner after 40, I cannot treat every run like a test. Some runs are there to keep the body moving without adding too much stress.

That day was not about speed.

It was about keeping the habit alive.

July 6: A Drill Workout Became a 1-Hour Run

July 6 was different.

Garmin Coach gave me a drill workout, but after the drill section, I kept running until I reached one hour.

The final result was 10.21 km in 1:00:00.

That run gave me confidence.

I did not start the session thinking I had to run 10 km. I simply followed the workout, kept moving, and continued until one hour was complete.

For me, that was meaningful.

It reminded me that sometimes the hardest part is starting.

Once the body begins moving, I can often do more than I expected.

July 7: A Simple Easy Run

On July 7, I ran 4.48 km in 30 minutes.

My average pace was 6:42/km, and my average heart rate was 129 bpm.

It was a normal easy run.

No special Garmin workout.
No big lesson.
No dramatic moment.

But that kind of run still matters.

A half marathon plan is not only made of special workouts. It also needs ordinary runs that quietly build consistency.

This was one of those ordinary but important days.

July 8: Another Drill Workout

On July 8, I completed another Garmin Coach drill workout.

The run was 5.01 km in 30 minutes and 48 seconds.

At first, Garmin Coach drill workouts felt confusing to me. They were not normal runs. They included short running sections, recovery parts, and changes in rhythm.

But by this point, I was starting to understand them better.

I began to see that drill workouts may not be about distance first.

They seem to teach rhythm, cadence, control, and awareness.

As a beginner runner after 40, that matters.

I do not just want to run more.

I want to learn how to move better.

July 9: Testing Run-Walk Intervals

On July 9, I tried a run-walk interval experiment.

I ran 5.15 km in 30 minutes and 1 second.

During that run, I tested different patterns of walking and running. I wanted to see how my body responded to different rhythms.

That run taught me something simple:

Walking during a run is not failure.

It can be part of training.

It can help control effort.
It can help the body recover while still moving.
It can make the run feel more manageable.
It can also teach me how rhythm changes pace and heart rate.

Before, I sometimes thought walking meant I was not running properly.

Now, I am starting to think differently.

For beginner runners, especially after 40, run-walk intervals can be a useful tool.

July 10: A Run Walk Run Workout That Felt Different

On July 10, Garmin Coach gave me a workout labeled as Run Walk Run.

At first, I expected repeated walk-and-run intervals.

But the actual workout felt more like a distance-based aerobic run.

It included a warm-up, a long main running section, and a cool-down.

I completed 10.06 km in 1:05:26, with a 6:30/km average pace and a 136 bpm average heart rate.

This run helped me understand something about Garmin Coach.

The workout name may not always explain everything clearly.

Sometimes I need to look at the structure and the data.

What was the heart rate?
Was the effort controlled?
Was the training effect aerobic?
Did the workout build endurance?

That day, the answer seemed clear.

It was a controlled base-building run.

And for half marathon training, that kind of session matters.

What This Week Taught Me

This week taught me several things.

First, Garmin Coach workouts can feel confusing at first.

The benchmark runs, drill workouts, and run-walk sessions are not always easy to understand while I am doing them.

But when I look back at the data, the purpose becomes clearer.

Second, easy runs are not wasted runs.

Some of my runs this week were slow. Some felt very easy. But they still helped build consistency.

Third, walking can be part of training.

I do not need to feel embarrassed about walk breaks, recovery sections, or slower days.

Fourth, half marathon training is not only about long runs.

It is also about rhythm, recovery, aerobic base, and learning how my body responds.

That may be the biggest lesson of the week.

Today, I Walked

Today, I did not run.

I only walked lightly.

After looking back at the week, that felt right.

Six runs in one week gave me a lot to think about. My body has been working. My legs have been adapting. My Garmin data has been giving me more questions and more clues.

So today, walking was not a failure.

It was part of the process.

As a beginner runner in my 40s, I want to keep improving, but I also want to keep running for a long time.

That means I need to respect recovery.

I need to listen to my body.

I need to understand that progress does not always come from pushing harder.

Sometimes, progress comes from knowing when to slow down.

My Takeaway

This week was not perfect.

Some workouts confused me.
Some runs were slow.
Some days were easier than others.
Today, I did not run at all.

But when I look at the full week, I can see progress.

I followed the plan.
I completed drill workouts.
I ran two 10 km sessions.
I experimented with run-walk intervals.
I kept showing up.
And today, I chose recovery.

That feels like a good week.

The half marathon still feels far away.

November 15 is not tomorrow.

But this week helped me believe that the distance is not built all at once.

It is built one session at a time.

One easy run.
One drill workout.
One run-walk session.
One recovery walk.
One small lesson after another.

That is how I am starting to understand Garmin Coach half marathon training after 40.

Related notes from my running journey after 40: