Peripheral circulation indicators in veteran trail runners.
Alexander Bolotin, Vladislav Bakayev
PMID 28626333WHAT IT FOUND
Seven veteran trail runners showed a short-term drop in finger blood flow in a simulated altitude chamber, then an increase.
A similar pattern appeared during mid-altitude training and before competition.
Key findings
01In the hypoxic chamber, microcirculation decreased at 360 minutes and then increased at 720 minutes.
02At mid-altitude, the microcirculation index fell from 11.2 ± 1.2 at baseline to 7.9 ± 1.3 during running load, then rose to 14.3 ± 1.1 before the start.
03The variation coefficient rose from 12.4 ± 0.85% to 18.2 ± 0.92% during maximum training load, then fell to 12.3 ± 0.87% before the start.
STILL TO COME
How it was doneWhat they found
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What it does not show
The study included only seven runners, so the measurements may not represent other veteran trail runners. It examined only veteran male runners, so it may not apply to female or younger runners. No separate control group was described. The paper did not report injury, function, or treatment response.
The easy way to misread this
Do not conclude that finger blood flow measurements can decide whether a veteran trail runner is ready for altitude competition. This study described seven male runners and did not test clinical outcomes or a treatment.