The next interval session arrived on another hot evening. The planned structure was five 1,000 metre repetitions with jogging recoveries, but the main instruction was more important than the target pace: keep the efforts controlled and let the weather influence the speed.
At 29°C, this was not the evening to chase the fastest split of the training block.
The data
| Metric | Result |
|---|---|
| Distance | Approximately 10.2 km |
| Time | 1:02:38 |
| Average pace | 6:09/km |
| Average heart rate | 142 bpm |
| Maximum heart rate | 166 bpm |
| Average power | 248 W |
| Elevation gain | 53 m |
| Temperature | 29°C, evening |
| Perceived effort | 6 to 7/10 |
The faster sections felt controlled, and heart rate fell clearly during the recoveries. That recovery pattern mattered more than whether every repetition matched an exact pace.
The summary record does not preserve a separately confirmed list of interval splits, so this post cannot make precise claims about the consistency of all five repetitions. The reliable conclusion is that the workout structure was completed without the final effort becoming maximal.
What the coach saw
ChatGPT rated the session as a successful progression from the previous week. The total distance returned above ten kilometres, maximum heart rate stayed below the planned ceiling and perceived effort remained at 6 to 7 rather than drifting to 9 or 10.
The average values are not especially useful on their own because warm-up, recoveries and cool-down are included. The clearer signals were the repeated rises and falls in heart rate and the absence of a late loss of control.
The heat adjustment also worked. A fixed pace target could have turned the final repetitions into a race. Using effort and heart rate kept the training stimulus without adding avoidable exhaustion.
What changed next
Thursday stayed completely easy, with pace treated as irrelevant. The weekend still contained a tempo run followed by a long run, so there was no reason to make the recovery run faster.
This session did not produce a dramatic breakthrough. It showed something more useful for half marathon training: a hard workout can finish with the feeling that another repetition might have been possible.
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