2026.08.01 🏃‍♂️‍➡️7.0km

The feeling of 'having a dialogue with your body' is wonderful! Even if your head (consciousness) intends to run as usual, your body is cleverly changing its control to match the day's condition. That is truly the real thrill and depth of running.
Now, analyzing the data under the condition of 'heat x heavy legs after standing work,' it really shows how your body was making adjustments!
📊 'Strategies taken by the body' and changes shown in the data
1. Extension of ground contact time (approx. 208 ms)
While your ground contact time was around 196-197 ms in recent runs, it was longer this time at 207.8 ms.
It seems that because your legs were heavy, your body naturally compensated by 'creating a cushion upon landing and carefully pushing off the ground with the entire sole' rather than snapping off the ground in an instant.
2. Landing impact significantly reduced (35.9 m/s²) & ground contact score recovery (67.6 points)
The landing impact, which had jumped to 46.8 m/s² during the 'forgot Bodymate' run on 7/30, dropped firmly to 35.9 m/s² this time!
Combined with the return of the supporter, the thickness of the MagicSpeed4, and the aforementioned 'careful ground contact (longer contact time),' you successfully avoided the direct impact on your legs. Your 'low-burden ground contact' score also made a V-shaped recovery to 67.6 points.
3. Minimization of deceleration (0.51 m/s) and 'smooth center of gravity movement' (67.9 points)
Deceleration tends to increase when legs feel heavy (as you tend to brake upon landing), but this time it was kept to 0.51 m/s, the lowest in recent runs.
As a result, your 'smooth center of gravity movement' score hit 67.9 points (a recent high)! It seems your body automatically switched to a running style that flows forward by skillfully using the movement (tilt) of your center of gravity, rather than forcing a push-off with leg strength.
💡 Comparison Summary
Metric | 7/28 (Good condition) | 7/30 (No supporter/Heavy) | 8/1 (Body heat/Heavy legs/Supporter on) | Body's response
Ground contact time | 197.9 | 196.7 | 207.8 | Stop snapping, step carefully
Landing impact | 38.8 | 46.8 | 35.9 | Avoid impact with cushion & cushioning
Deceleration | 0.53 | 0.58 | 0.51 | Flow forward without braking
Center of gravity movement score | 62.3 | 58.5 | 67.9 | Improved efficiency of gravity movement
You can clearly see from the numbers that your body was autonomously setting up a defense & energy-saving mode on a route separate from your consciousness, thinking things like, 'Oh, my legs are heavy today, so I'll flow with the tilt of my center of gravity instead of pushing off,' or 'The landing impact is tough, so I'll stay on the ground a bit longer to dissipate the impact!'
Your decision to avoid chasing distance and instead take short breaks to prevent heatstroke was also spot on. Please take your time to let the heat and fatigue accumulated in your body dissipate!

Sorry to keep you waiting. I actually looked at the contents of the CSV this time. 😎
And today's theme—'What shows up in the data when your legs feel heavy'—is a pretty interesting result.
In conclusion,
Today, it's not that your 'form is bad,' but that 'your legs are heavy' is showing up quite honestly in the data.
And it matches your own self-analysis quite well, Nora Kaihyo.
First, Garmin:
Today's 7.0km was an average pace of 5'16/km, average heart rate 142, cadence 185, stride 1.00m, ground contact time 226ms.
What stands out here is the 226ms ground contact time.
When you were in good shape recently, you were often in the low 200ms range on Garmin, and 190-205ms on Runmetrix.
Today, it is clearly longer.
And your cadence is 185 spm.
Compared to the 190 or so recently, this has also dropped a bit.
In other words,
The feeling of 'turning your legs quickly, landing lightly, and moving on' was weak today.
This is exactly the numerical proof of 'heavy legs'.
________________________________________
However, your form itself hasn't collapsed unexpectedly.
This is the interesting part about today.
Runmetrix's overall score was:
75 → 68 → 69 → 69 → 69 → 69 → 69
Except for the beginning, it was stable at 69.
And,
Stable posture: 97–100
Surprisingly, almost a perfect score.
Furthermore,
Full-body coordination centered on the pelvis: 66 → 67 → 70 → 70 → 74 → 71 → 71
It actually went up in the second half.
This is quite good.
It's not a state where 'my legs are heavy, so everything down to my hips is a mess.'
Rather,
Your upper body and pelvis are maintaining the proper running form, but only the reaction of your lower body is sluggish.
That's the feeling.
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And the 'power of movement' is low.
This seems to be the main culprit today.
Runmetrix's 'power of movement' was:
55 → 46 → 46 → 48 → 43 → 45 → 45
This is quite low.
On days when you were in good shape with the MagicSpeed4 before, this was much higher.
In other words, today,
You were able to maintain your form, but there was no 'sense of power' in your movement.
It matches perfectly with your own feelings, Nora Kaihyo:
'My legs feel heavy'
'A run of endurance'
'My legs showed no signs of recovery'
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And what about 'smooth center of gravity movement'?
This was:
66 → 68 → 63 → 63 → 71 → 64 → 68
It's not as bad as I thought.
On your 33.5℃ run on 7/20, it dropped to the 40s, but today the lowest was 63.
In other words,
Today wasn't a day where 'my legs were so heavy that even my center of gravity movement broke down.'
Rather, you maintained a high hip position and center of gravity movement reasonably well.
This is likely the result of 'not forcing it today and running in accordance with my body.'
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So, what represents the 'heaviness'?
For Chappy, it's quite clear.
① Long ground contact time
② Low cadence
③ Low power of movement
④ But posture and pelvic coordination are maintained
This set of four.
In other words,
A day where 'you have the ability to maintain form, but your legs themselves lack snap.'
This is a bit different from a 'day when your form collapsed.'
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And the condition of 34.1℃.
Today's Garmin average heart rate was 142.
At a pace of 5'16/km, you weren't pushing yourself that hard cardiorespiratorily.
Yet your legs were heavy.
So today, it's natural to see it as:
Your legs were hit by the heat and fatigue before your heart and lungs were.
Since you felt 'heat was trapped in your body' before you even started, your body's voice was likely quite correct today.
And you properly slowed your pace and increased your short breaks.
As a result, you were able to finish at 7km without breaking your form.
I think this was a very good judgment.
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And I love the second half of today's log. 😊
'Even though my head thinks I'm running with the same sensation every time,
my body's condition is different every day.'
This is exactly what today's data shows.
Even though you think you're doing your 'usual run,' today your body was saying,
'No, no, I can't put out that kind of output today' (laughs).
But Nora Kaihyo, you were like,
'Okay, I'll slow the pace,'
'I'll take more breaks,'
'I'll finish without the 300m sidewalk today,'
and you adjusted to that body.
I think this fits your current running style very well.
Instead of 'making your body do the decided menu,' it's 'consulting with today's body and creating that day's run.'
It's exactly what you wrote today: 'having a dialogue with your own body.'
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Today's Chappy verdict 🌡️
◎− (A skillful run despite feeling sluggish)
In terms of running numbers alone, it doesn't reach a good day like 7/30, of course.
But the flow of 'legs feel heavy → slow pace → increase breaks → still maintain posture/pelvic coordination → finish at 7km' is very clean.
And what makes me happiest about this data is that 'heavy body = form collapsing' is no longer happening.
Today's 'stable posture' score of almost 100 is a symbol of that.
So today, I want to evaluate it not as a 'run where you were in bad shape,' but as a 'run where you properly adjusted to a body in bad shape.'
And 'even if sluggish, running is fun'—this is ultimately the most important thing. 😁
Today, your body sent a notification saying 'it's like this today,' and you read it properly.
Chappy quite likes this kind of run.