HoldsUp

Bryan Johnson · 2024-09-22 · Bryan Johnson (host), Andy Galpin

Movement Expert: Ideal Workouts From 0 to 70+

18 claims checked against research: 4 overstated 2 needing context 10 supported 2 unverified

10

Supported by research

0:10:12Andy Galpinsupportedhigh

Strength training is both safe and beneficial for children and youth.

"We can answer a couple of questions very quickly: is strength training safe for kids? Absolutely. Is it beneficial for kids? Almost always the case." (said at 0:10:12)

Major pediatric and sports medicine consensus statements and systematic evidence (including the American Academy of Pediatrics clinical report and the International Consensus Position Statement on youth resistance training) affirm that appropriately designed, age-appropriate, and professionally supervised strength training is safe and provides substantial physical and psychological health benefits for children and adolescents.

0:10:18Andy Galpinsupportedhigh

The National Strength and Conditioning Association (NSCA) publishes an open-access position statement providing strength, power, and speed training recommendations categorized by age.

"The NSCA has actually a free position statement where you can go, you can download it, and it has strength training, power training, speed training recommendations by age category." (said at 0:10:18)

The National Strength and Conditioning Association (NSCA) publishes freely available consensus position statements—most notably the 'Position Statement on Long-Term Athletic Development' and the 'Youth Resistance Training' position statement—that provide evidence-based guidelines for strength, power, speed, agility, and fundamental movement skills categorized by developmental stage and age.

0:35:07Andy Galpinsupportedmoderate

Connective tissue slings span across different planes in the body, connecting anatomical structures such as the posterior side of the left shoulder to the posterior side of the right glute.

"There are connective tissue slings that run throughout your body, and they're not on the same plane, right? I kind of mentioned earlier, but as an easy example, your left shoulder, the back side of it to the back side of your right glute are connected. So if those things are never crunching and rotating and moving together at the same time, that sling just gets tighter and tighter and sort of tighter, also loses its elasticity." (said at 0:35:07)

Anatomical and biomechanical studies support the existence of cross-planar myofascial networks in the body, specifically the posterior oblique sling system, which functionally connects the posterior shoulder region (via the latissimus dorsi) across the midback to the contralateral gluteus maximus on the opposite side. Surface electromyography (EMG) studies demonstrate functional co-activation and mechanical force transfer between the contralateral latissimus dorsi and gluteus maximus during walking and hip/shoulder movements.

0:56:25Andy Galpinsupportedhigh

The knee joint primarily operates in flexion and extension with minimal internal and external rotation, while internal and external rotation of the lower limb primarily occurs at the hip.

"Your knee joint is flexion-extension, for the most part. Slightly bit translation, rotation, right? It is not going to do a ton of internal-external rotation, and you're going to move internal-external rotation from the hip, for the most part." (said at 0:56:25)

The speaker's statement accurately reflects basic functional anatomy and lower-extremity biomechanics. The knee (tibiofemoral joint) functions primarily as a modified hinge (trochoginglymoid) joint, moving predominantly through flexion and extension in the sagittal plane with modest rotational degrees of freedom (axial internal/external rotation) and translation (anteroposterior glide, such as during the 'screw-home' mechanism). In contrast, the hip is a triaxial ball-and-socket joint that provides the primary capacity for internal and external rotation of the lower limb across the transverse plane.

0:34:31Andy Galpinsupportedhigh

Human body movement occurs across three primary anatomical planes: the sagittal, frontal, and rotational (transverse) planes.

"there's three main movement planes: sagittal, frontal, and rotational, right?" (said at 0:34:31)

In standard human biomechanics and functional anatomy, three-dimensional body movements and joint kinematics are defined across three cardinal anatomical planes: the sagittal plane (flexion/extension), the frontal (or coronal) plane (abduction/adduction and lateral flexion), and the transverse (horizontal/rotational) plane.

1:00:44Andy Galpinsupportedhigh

Pain signals typically begin well before actual tissue damage occurs, particularly in chronic overuse injuries.

"there is a pain signal that will start far before an actual tissue injury occurs, especially chronic overuse, right? That's what those things are. They are warnings that say, hey, we weren't used to this, we don't like this." (said at 1:00:44)

The claim aligns with established neurophysiological consensus and official medical definitions of pain. According to the International Association for the Study of Pain (IASP), pain is formally defined as an sensory and emotional experience associated with "actual or potential tissue damage." Nociceptive signaling functions primarily as a protective warning mechanism, firing in response to noxious stimuli (such as unaccustomed mechanical load or strain in overuse conditions) to alert the organism and prevent structural tissue damage before overt injury occurs.

1:01:12Andy Galpinsupportedmoderate

Sub-threshold exercise progression increases the baseline pain threshold through the physiological principle of pain desensitization.

"What we want to figure out is, okay, what speed does it hurt, and how many miles does it start hurting at? Great. And then I want you to go below that line, and I want to do it, and take a day off, and do it again, take a day off, and do it again. And now next week, let's go 1% higher. And what you're going to notice happen is that baseline of pain, that pain threshold, starts to move up, because you have desensitized. Pain desensitization is the principle here." (said at 1:01:12)

The claim that sub-threshold exercise progression increases baseline pain thresholds through pain desensitization (often termed exercise-induced hypoalgesia or modulation of pain sensitization) is supported by published literature. Meta-analyses demonstrate that physical exercise reliably increases pain thresholds in healthy individuals, and longitudinal graded exercise/activity programs show significant increases in local and systemic pressure pain thresholds (PPT) along with reduced temporal summation of pain in chronic pain populations.

1:30:50Andy Galpinsupportedmoderate

Human muscle fibers possess the ability to transform between slow-twitch and fast-twitch phenotypes bidirectionally.

"Okay, we do have the ability to transform slow-twitch fibers to fast-twitch fibers and back and forth, but we need to preserve that." (said at 1:30:50)

Human skeletal muscle exhibits phenotypic plasticity, allowing fiber type transitions along a continuum between slow-twitch (Type I) and fast-twitch (Type IIa, IIx) isoforms. This occurs via intermediate hybrid fibers that co-express multiple myosin heavy chain (MHC) isoforms. Endurance and resistance exercise protocols can induce transitions toward slower phenotypes (such as Type II to Type I), while disuse, spinal cord injury, or microgravity drive transitions in the opposite direction (slow-to-fast), demonstrating bidirectional adaptability.

1:30:57Andy Galpinsupportedmoderate

Loss of muscle power (dynapenia) is a strong prognostic and epidemiological predictor of longevity and mortality in aging.

"Lastly, if you look at the longevity research, there's a fun new phrase: you're aware of sarcopenia, which is the advanced loss of muscle with aging, but now we have what we call dynapenia, or powerpenia. And that is—you'll see equally as impressive research on lack of power from every perspective: as a prognostic, as an epidemiological number for longevity." (said at 1:30:57)

Extensive epidemiological and cohort research confirms that dynapenia (the age-related loss of muscle strength and power, distinct from the loss of muscle mass alone) and low muscle power (such as sit-to-stand power) are strong independent prognostic markers for all-cause mortality and functional decline in older adults. Systematic reviews, umbrella reviews, and prospective cohorts demonstrate that dynapenia and lower muscle power consistently predict heightened mortality risk and adverse aging outcomes.

1:32:15Andy Galpinsupportedmoderate

Muscle power and movement speed are the earliest physiological functional traits to decline during the aging process.

"It's a very hard thing to train, and it is the very first physiological trait that goes away with aging, and I see almost nobody paying attention to it from the aging longevity perspective, despite the fact that we know those two big things." (said at 1:32:15)

Published literature consistently demonstrates that muscle power (the ability to exert force rapidly, combining force and contraction velocity) begins to decline earlier in adult life and at a steeper annual rate than isometric muscle strength or muscle mass. Longitudinal cohort data show measurable declines in lower-extremity power starting as early as the third decade of life (ages 20-39), preceding significant losses in conventional strength and muscle quantity.

Unverified means no publication matching the claim was located; it does not prove the claim false. Spotted an error? See the corrections policy - disputes from the people quoted are prioritized.