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I’ve a query for you.
What share of feminine runners do you suppose have Low Power Availability (LEA)?
5%? Perhaps 10?
Maybe you’re pondering larger, 20 – 25%?
A brand new examine suggests you may nonetheless be a way off! Whitney et al. (2024) assessed 1030 Boston marathon runners utilizing self-reported surveys to evaluate for LEA.
Of their examine, 42.5% of feminine runners had been classed as having Low Power Availability!
Should you’re not acquainted with LEA it outcomes from an athlete not consuming sufficient power from their weight-reduction plan to fulfill the calls for of every day life and sport. It may have adverse results on a number of areas of well being and efficiency as highlighted within the examine abstract beneath:
That is such an necessary paper and I’d encourage you to debate it with athletes in your care. It’s the most important examine of its form ever performed at a real-world marathon occasion and the primary to reveal a hyperlink between dietary “under-fuelling” and slower race efficiency instances in addition to elevated threat of requiring race-day medical consideration.
There’s quite a bit to take from this analysis so I’d encourage you to learn the complete paper, it’s open entry in BJSM and accessible through this hyperlink.
The inhabitants included on this examine is a pleasant illustration of marathon runners you’re more likely to see in clinic. The examine group was 53% feminine and 47% male, roughly 75% had been Boston Qualifiers and 25% charity group registrants.
We all know a number of elements can affect race day efficiency nevertheless it does appear that power availability was key:
It’s important that as well being professionals we’re conscious of Low Power Availability and the impression it will possibly have on well being and efficiency. It’s a key driver of RED-S and will be related to consuming problems and train dependancy so it’s important that athletes have the help they want, doubtlessly together with a Psychological Well being Skilled and referral to a Sports activities Doctor.
I’ve chatted with Dr Whitney through social media and he or she’s very kindly shared some nice info on indicators of LEA to look out for in athletes:

I requested Dr Whitney concerning the subsequent steps and he or she highlighted how necessary it’s to rearrange a session with a Registered Dietician who specialises in sports activities efficiency because the power and diet wants of every athlete are advanced and extremely variable. Alongside this Dr Whitney shared some common recommendation that may be useful for athletes:

I like this clear, easy message from Dr Whitney and her analysis, “Fuelling is quicker!”
I believe we ought to be spreading this far and vast to well being professionals, coaches and athletes. So many issues with runners change into a part of the ritual of their sport, from proudly owning far too many pairs of trainers to warming up and beginning your GPS watch. It’s all a part of working and diet ought to be the identical, a part of that ritual. It may be a really fulfilling half too!
I encourage runners to have a post-run restoration and fuelling technique that they will sit up for, it helps them by means of the lengthy runs, particularly if it’s chilly and moist! For me it was a sizzling chocolate, fruit, some good snacks and a soak within the tub. That turned a key a part of my ritual and one thing I cherished.
I’d wish to say an enormous thanks to Dr Kristin Whitney for her analysis and sharing her knowledge and likewise to her co-author Dr Alexandra F. Dejong Lempke who has additionally been a giant assist with bringing this info collectively. You possibly can observe them each on Instagram: @Kristinwhitney.md and @afdlempke3

