Simon Hill
Simon Hill is a nutrition scientist and physiotherapist. His published research investigates dietary patterns, including the relationship between omnivore, vegan, and vegetarian diet quality and depressive symptoms. He has also authored commentary analyzing historical trends in saturated fatty acid consumption and their relationship with non-communicable diseases.
26 claims checked on air: 3 context 1 overstated 22 supported
What they said on air - context
There is no difference in muscle size or strength outcomes between plant and animal protein diets.
"You do not see a difference in muscle size or strength regardless if it was animal or plant, regardless of the two diets." (said at 0:00:46)
Randomized controlled trials and meta-analyses indicate that when total daily protein intake is sufficient (e.g., ~1.6 g/kg/day) and paired with resistance training, plant-based and animal-based protein sources result in comparable increases in muscle size (hypertrophy) and muscular strength. However, this equivalence requires adequate total protein and essential amino acid (notably leucine) intake to compensate for the lower anabolic potency and digestibility of individual plant proteins. In broader meta-analytic data not standardized for high protein intake, animal protein intake shows small advantages for percentage lean mass and absolute lean mass accrual in younger adults.
- supports: High-Protein Plant-Based Diet Versus a Protein-Matched Omnivorous Diet to Support Resistan… (Sports medicine (Auckland, N.Z.) 2021) · cited 128x in the literature
"A high-protein (~ 1.6 g kg -1 day -1 ), exclusively plant-based diet (plant-based whole foods + soy protein isolate supplementation) is not different than a protein-matched mixed diet (mixed whole foods + whey protein supplementation) in supporting muscle strength and mass accrual, suggesting that protein source does not affect resistance training-induced adaptations in untrained young men consuming adequate amounts of protein." (abstract, conclusions, passage verified)
pubmedfull study (doi) - context: Animal Protein versus Plant Protein in Supporting Lean Mass and Muscle Strength: A Systema… (Nutrients 2021) · cited 157x in the literature
"Results from the meta-analyses demonstrated that protein source did not affect changes in absolute lean mass or muscle strength. However, there was a favoring effect of animal protein on percent lean mass. RET had no influence on the results, while younger adults (<50 years) were found to gain absolute and percent lean mass with animal protein intake (weighted mean difference (WMD), 0.41 kg; 95% confidence interval (CI) 0.08 to 0.74; WMD 0.50%; 95% CI 0.00 to 1.01)." (abstract, results, passage verified)
pubmedfull study (doi)
From the age of 30 onwards, adults lose approximately 0.5% to 1% of muscle mass per year.
"And and what we see is from the age of about 30 onwards, we see a reduction in muscle mass, about half to to kind of um 1% per year" (said at 0:40:11)
The speaker's statement that muscle mass decline begins around age 30 at roughly 0.5% to 1% per year (commonly cited in geriatric literature as a 3% to 8% loss per decade) reflects widely recognized population estimates, but requires nuance. Whole-body magnetic resonance imaging (MRI) studies evaluating skeletal muscle mass across the adult lifespan show that while relative skeletal muscle mass begins to decline in the third decade (around age 30), significant absolute skeletal muscle mass loss typically accelerates later, noticeably after the fifth decade (around age 50).
Approximately 80% to 90% of the United States population fails to meet standard resistance training guidelines.
"So and and if you like 80 80 or 90%, I think, of the US population are not meeting the resistance training guidelines." (said at 0:50:08)
Nationally representative surveillance data from the United States show that approximately 73% to 80% of US adults do not meet the federal muscle-strengthening activity guidelines (defined as performing strength training at least 2 days per week). Analyses of the National Health Interview Survey (NHIS) indicate that adherence to muscle-strengthening guidelines rose from 19.8% in 1997 to 27.2% in 2018 (leaving ~73% to 80% non-adherent). Non-adherence rates reach 80% to 85% when evaluating combined guidelines (meeting both aerobic and muscle-strengthening criteria) or specific demographic subgroups (such as rural populations, where only 21.1% meet strengthening recommendations).
- context: Prevalence of Meeting Aerobic, Muscle-Strengthening, and Combined Physical Activity Guidel… (MMWR. Morbidity and mortality weekly report 2023) · cited 61x in the literature
"Prevalence of meeting the aerobic, muscle-strengthening, and combined aerobic and muscle-strengthening guidelines was consistently the lowest in Nonmetropolitan counties (38.2%, 21.1%, and 16.1%, respectively) and highest in the West region (52.1%, 35.3%, and 28.5%, respectively). Regardless of rural-urban classification and region, no more than 28% of adults met combined aerobic and muscle-strengthening guidelines." (abstract, results, passage verified)
pubmedfull study (doi) - supports: Trends in adherence to the muscle-strengthening activity guidelines in the US over a 20-ye… (General hospital psychiatry 2023) · cited 10x in the literature
"The overall prevalence of adherence to MSA guidelines significantly increased (p < .001) from 1997 to 2018 (19.8% to 27.2%, respectively)... It is over a 20-year span, adherence to MSA guidelines increased across all age groups, although the overall prevalence remained below 30%." (abstract, results and conclusions)
pubmedfull study (doi)
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