2026.06.23 🏃‍♂️‍➡️7.5km

Thank you so much for your hard work at your desk job! I completely understand the feeling of starting a weekday rehab run with a stiff body and forgetting your BodyMate.
I have analyzed the provided lap_form_data - 202606231811.csv and Garmin_260623.csv.
The mystery of the Runmetrix 'low score but great form' tsundere comment has been 100% solved by looking at the data trends!
The 'lightness after loosening up' and the 'good foot strike in the last 300m' you felt are dramatically proven by the numbers.
📊 6/23 AI Data Analysis: Solving the 'I don't get it' mystery
Why did Runmetrix give such contradictory evaluations?
It's because your form changed so drastically between the 'first 2km right after desk work' and the 'loosened-up second half' that it was like two different people running.
① [First 2km] The curse of desk work (the culprit behind the low score)
During the first 1-2km, the effects of your hip joints and knees being locked up from sitting all day were intense.
• Landing impact (left): Recorded an ultra-high load of 65.1 ⇒ 62.9 m/s², the highest I've ever seen.
Combined with the lack of BodyMate, you were landing with your stiff left leg as if you were 'thumping' the ground. The AI likely picked up this thumping during the first 15-20 minutes and judged it as 'high skeletal burden = low score'.
② [From 3km onwards] 'Great form' after loosening up
However, from the 3km mark (where your pace increased to 5:01/km), your body's gears shifted completely.
• Pelvic rotation: 14.9° in the first half ⇒ 18.0° in the second half (a new high for this season!)
• Landing impact (left): Dropped sharply from 65.1 in the first half to 50.9 m/s²!
As your body loosened up, your stiff hip joints were fully released, and your pelvis began to rotate with an astonishing dynamism of 18°.
When the pelvis rotates, you stop landing only on your toes, which is why the impact on your left leg dropped by nearly 15 m/s² all at once.
③ [Last 300m sidewalk x4 (after 7km)] Why the foot strike felt good
The final stretch where you intuitively felt your foot strike was good.
• Lateral impact (side-to-side sway): Left 40.3 / Right 36.2 m/s²
Even though your speed increased to the 4:50/km range (stride length extended to 1.08m), your lateral sway was kept very low.
The 'straight-line stability inherited from the Magic Speed' of the HyperSpeed 5 worked its magic here, preventing your feet from drifting outward even without the BodyMate, giving you that pleasant sensation of catching the road surface squarely with your whole foot.
💡 AI Conclusion: Runmetrix's intention
Runmetrix's AI strictly penalized your 'score' for the thumping landings in the first half, but gave you its highest praise of 'Great form (you are using your body correctly)' for the process in the second half where you increased speed, rotated your pelvis by 18°, and reduced landing impact on your own. It's a convincing tsundere, isn't it? (lol)
🧭 One-point advice for next time
• Pain in the medial head of the gastrocnemius: The fact that you endured such high impact (65 in the first half) without the pain returning is proof that your tissues have become quite strong.
• Countermeasures for weekday desk work: Next time you run on a weekday, BodyMate is essential to prevent that 'thumping landing' in the first 2km. Let's leave it on top of your shoes at the entrance so you don't forget it (lol).
It's truly impressive that you can correct your form on your own while running, starting from a stiff state after desk work, and finish with such a high-quality final stretch. Nice recovery, and great work today!

I see, looking at the data, I can kind of understand why Runmetrix gave you the 'Great form' comment 🤣
First, your prediction.
I'm sure the left impact is high again today.
Yes, that prediction is correct (lol)
Landing impact was throughout almost all segments:
• Left: 51–65
• Right: 35–41
So, it's the familiar 'left-dominant pattern' lately.
And you forgot your BodyMate today, too 😅
But that's not the interesting part.
What Runmetrix is probably praising is:
Stable posture: 100 points in all segments
This is it.
It's genuinely impressive.
Plus:
• Pelvic coordination: Increased from 64 to 76
• Symmetry: Improved from 74 to 88
• Ground contact time: Improved from 230ms to around 200ms
Your body was getting more integrated the more you ran.
So, from the AI's perspective,
the judgment was likely: 'Left impact is high, but posture control is excellent.'
________________________________________
And your feeling today,
Last 300m sidewalk x4 felt like a good foot strike
This also matches the data.
After 5000m,
• Pelvic coordination 76
• Symmetry around 80
• Ground contact time around 200ms
Stable.
It's the 'body thawing out while running pattern' we've been talking about lately.
It's a typical trend after desk work.
________________________________________
On the other hand,
the reason for 'Great form despite low score' is that the overall score is heavily dragged down by 'low-burden landing' and 'center of gravity movement'.
Today,
• Low-burden landing: 51–56
• Smooth center of gravity movement: 45–56
were on the lower side.
In other words,
Posture is good
↓
Left-right difference improved somewhat
↓
But landing impact and center of gravity movement didn't improve
↓
Overall score stuck at 64–67
That's the structure.
That's why 'Great form' and 'Overall score 64' coexist at the same time 🤣
________________________________________
Also, one thing that caught my attention today is that,
among the recent HyperSpeed 5 days,
it feels like your feet were working harder than expected.
On the first day with the HyperSpeed,
you said 'I could run happily without thinking about anything',
but today, due to the stiffness after desk work,
it felt like you were carrying yourself with your legs a bit.
That's probably why the center of gravity movement is around 50.
________________________________________
If I had to summarize today's evaluation in one phrase,
'Form is good. Just lacking propulsion.'
So today, rather than 'Oh, the left impact!', it's more of a day to look at 'My lower back and hip joints haven't fully thawed out yet'.
Actually, if you felt 'Oh, this is it' during the last 300m x4, I think you can trust your intuition 😊
Looking at recent data, your pattern for a good run is almost always the same, and it's converging on 'how to thaw out the first 1-2km of the run'. Especially on days you go into the office. 🤣