Trent Stellingwerff, PhD / CSEP-CEP / FACSM / ChPC

1/ Big update in exercise science: ACSM has revised its resistance training Position Stand for the first time since 2009. That is a 17-year gap, and a lot has changed. 🧵pmc.ncbi.nlm.nih.gov/articles/PMC12…

After 17 years, the ACSM just updated their resistance training guidelines. So, what's changed?

Is human energy expenditure constrained? See below for a thread based on a debate I participated in last year

Seen dubious comments that Keely put 6kg body mass on. Context, in Paris ‘24 she lost 3kg so increase only 3kg to prior. At lower mass she got injured. Let’s applaud a young woman who puts health first, is growing into her adult body & doesn’t get fixated on unstable numbers

@McKirdyTrained @stevemagness @NCAADIII @RowanUniversity @RowanMXC_Track Or further - NCAA performances are used to qualify for worlds, Olympics or for records etc etc......

@stevemagness @NCAADIII @RowanUniversity @RowanMXC_Track If the NCAA uses performances and rankings as part of an athlete's ability to qualify for USATF... it doesn't make sense that these athletes wouldn't be under world athletics' rules and regulations.

This is disgusting. NCAA runner caught by teammates using banned substances. Teammates do the right thing and turn him in. And now he’s running at a D3 school setting records, facing zero consequences. Do better: @NCAADIII @RowanUniversity @RowanMXC_Track

Did I read the article? I wrote it @LoreofRunning1

Thanks you @BaileyDM for a personalized / signed copy of your new book! Looks great!

The UCI recently commissioned top researchers to write a series of reviews with the cutting-edge science on nutrition for cyclists. We talked with one of the lead authors, @jwhitfie, about where we're at with supplements. fasttalklabs.com/fast-talk/expl…

McGill University and their Sports Science Institute has joined the Wu Tsai Alliance as an institutional partner! They have a new faculty position: Tenure track Assistant Professor Applied Exercise Physiology. Deadline: March 2, 2026 mcgill.wd3.myworkdayjobs.com/en-US/McGill_C…

So you've watched the Olympics and ask yourself: "What are they feeding those Norwegians?" The answer is already out there - kindly provided by @OyvindSandbakk and @StephenSeiler et al last year. Open access... 👉 pubmed.ncbi.nlm.nih.gov/40278987/

A quick lesson in research conflicts of interest: This 2024 paper in the Journal of Dietary Supplements showed that an oxygen "nanobubble beverage" improved power output in a 16-km cycling TT by ~4%, and in repeated Wingates by ~7%. 🧵1/7

Coffee and improved cognition, reduced dementia >130,000 people followed 37 years Benefit seen only with caffeinated coffee or tea and most pronounced ~2 cups/day @JAMA_current ☕️☕️jamanetwork.com/journals/jama/…

Interesting read on Testosterone pmc.ncbi.nlm.nih.gov/articles/PMC12…

@StephenSeiler @JeroenSwart Saw the same thing........doesn't add up.

@JeroenSwart Same sad cringe response here: Two immediate thoughts: 1. There seems to be a regular "marketing bias "involved, 2. ~VO2 max at RER of 0.93, seriously? 3. If snapshot VO2 and RER were correct, then his running economy would have to be quite terrible.

Can someone please go to Norway and teach the physiologists how to calibrate a metabolic cart. Seems we get dodgy VO2 data every second year with wildly inaccurate values and sensational stories about incredible endurance athletes. Only ever happens in Norway. Bizarre.

The concept of strategically reintroducing carbohydrates for exercise performance following low carb/keto adaptation isn't new. Work from @TStellingwerff in 2006: pubmed.ncbi.nlm.nih.gov/16188909/ And more recently from us in 2021: pubmed.ncbi.nlm.nih.gov/32697366/

Virtually all elite athletes test different fueling strategies @AKoutnik. If performance didn't suffer with less, it would have been adopted. Fueling during racing is difficult/costly - and dangerous in cycling (Alberto Contador almost died from a crash while eating at 50 mph in the Tour). It's not a marginal impact when you consider that the number of low-carb triathlete pro winners at Kona: 0. Number of low-carb protour cylists: 0. Western States record holder: 90+ grams/carbs/hour (all top 5 finishers in 2024 > 90 grams/hour). Leadville 100 record holder: 90-150+ grams per hour. Late race performance in virtually all endurance event has been increasing due to these high-carb strategies increasing durability (fatigue resistance).

Visually, it "looked" like threshold pace, but @hobbs_kessler will need to confirm. Maybe it was just a spicy cooldown, with extra pep in his stride...a WR will do that to ya!

What's a guy do after setting an indoor WR?@hobbs_kessler looked to be at work doing some post race threshold @thetrackatnb. Best part, was Hobbs looked down, and caught me giving him a thumbs up and gave one back -man of the people! (we met a Flag a while back!) @letsrundotcom

A simple and genuine question: How come this goes against everything that actual elite performers in the actual arena do and find helpful. If keto or any of these ideas have a significant advantage, then after experimentation, elites would surelytake them up. Or there’d be a Fosbury flop phenomenon where innovation proves success and everyone copies. It hasn’t occurred. Despite some experimenting with many of these ideas. But time and time again, what works in the arena is pushing carbs up. See the recent bump in marathons from Maureen’s breakthrough. Or the recent push in even ultras for high carb during. I’d love to understand why you think that you’ve got it right, and all those whose livelihood depends on finding extra seconds got it wrong? Because history almost always points in the other direction.

1/ NEED vs SUFFICIENT: why this lifting debate misses the point. There’s a big difference between what is needed and what is sufficient for muscle and strength adaptations. Confusing the two is where gym arguments go off the rails. Thanks @foundmyfitness for reigniting 😂