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Ruth Performance Lab

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2 contributions to Ruth Performance Lab
Carbohydrate Ingestion on Exercise Metabolism and Physical Performance
https://academic.oup.com/edrv/advance-article/doi/10.1210/endrev/bnaf038/8432248?searchresult=1 Big paper from some big names challenging that more carbs is always the ideal strategy. Points out that exercise-induced hypoglycemia correlates strongly with exercise fatigue, much higher than glycogen stores. Also, good podcast discussing the paper in-depth below: https://open.spotify.com/episode/3PR2jkrj0NOnQzlYOJ5LSQ
1 like • 2d
@Kyle Ruth thought you would enjoy. I agree it doesn’t change the prescription for optimal fueling at CrossFit events but the idea of monitoring hyperglycemia is something to consider.
Quad Strain Rehab: Day 3 (Day 5 POST INJURY)
Intent: I'm Still operating like I'm in phase zero. My goal today was primarily to improving gait quality - hobbling around sucks and I want this back first. The other thing I wanted to do was explore some movement combinations where I could use a yielding ISO on my injured right leg + an overcoming ISO on my healthy left leg, using the "cross-education" principle. The way we understand it is that training the healthy limb maintains strength, coordination, and muscle activation in the injured limb WITHOUT DIRECT LOADING. It's mainly a NEURAL adaptation not a muscular. -------------------------------------------------- Rehab / Training Session: A. BFR Bike-erg - 5:30min @ 2:20 pace, damper 3 • Wrapped BOTH legs here. I had to move the wrap on my right (injured) leg 3–4" lower than where I'd normally use my cuffs simply due to the location of the strain. • Wrap was a subjective 7/10 tension, minimal pain in the injury site, but got a REALLY strong pump / BFR response from this by the 5min mark -- I'm going to call that success. -------------------------------------------------- B. Contralateral Circuit - 4 Rounds 1min Ski @ R2 recovery pace 10sec Hand Assist SJ Stance Yielding ISO (injured leg = leg trail leg) 10sec SJ Stance Overcoming ISO (injured leg = lead leg) • My goal here was to try to reclaim the position of injury as soon as possible and start building confidence / strength in the rec fem with a safe / low-pain isometric. I had a lot of shaking, but no escalation in pain and a definite improvement in gait after this **note: I added a video of this movement paring -------------------------------------------------- C. Bilateral + Contralateral Circuit - 4 Rounds 10 Box Squats w/ Chains (18" Bench, up to 105#, with 40# chain) 15sec Hand Supported Low-lunge ISO (injured leg = trail leg) *deeper knee flex & hip ext, but less overall loading 8 Single-DB Split Squat (injured leg = lead leg) -------------------------------------------------- D. Finisher:
Quad Strain Rehab: Day 3 (Day 5 POST INJURY)
0 likes • Dec '25
Outside of direct lactate building at the injured muscle with BFR and ISOs, do you try to find other ways to increase overall lactate production and do you feel that would help in tissue repair?
1 like • Dec '25
@Kyle Ruth seems to be a multifunctional signaling molecule that can help tissue repair a ton! I try to find a machine I can do without any pain to the injury and get after it - subjectively seems to help in the a cute post workout pain signaling as well as overall healing timeline.
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Matt Link
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@matt-link-1733
Matt Link

Active 1d ago
Joined Dec 16, 2025
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