Fitness
40% lower dementia risk: The workout habit that could protect your aging brain
TIANJIN, China — Your body’s ability to handle a workout might be more than just a matter of physical prowess – it could be your brain’s insurance policy. That’s the fascinating conclusion from a massive new study that’s rewriting our understanding of the connection between fitness and cognitive health. According to scientists, your heart and lung fitness might be one of the best defenses against cognitive decline.
The comprehensive study, published in the British Journal of Sports Medicine, reveals that individuals with higher cardiorespiratory fitness not only perform better on cognitive tests but also face a significantly lower risk of developing dementia – even if they carry genetic risk factors for the condition.
The Power of Cardiorespiratory Fitness
Cardiorespiratory fitness (CRF) – a measure of how well your body can supply oxygen to your muscles during physical activity – has long been recognized as a crucial indicator of overall health. Think of it as your body’s engine efficiency: the better your CRF, the more effectively your heart and lungs can keep your body running during exercise. This fitness metric naturally declines as we age, with the decline accelerating more rapidly in our later years. By our 70s, we might be losing over 20% of our CRF per decade.
In this landmark study, researchers from various institutions, including Tianjin Medical University and the Karolinska Institute, followed over 61,000 participants from the UK Biobank for up to 12 years. The participants, all between 39 and 70 years-old, underwent a simple six-minute exercise test on a stationary bike to measure their cardiorespiratory fitness levels. Unlike previous studies that required participants to exercise to exhaustion, this study used a more manageable submaximal exercise test, making it more practical for people of various fitness levels.
The results were striking. People with high CRF showed better performance in several cognitive areas, including prospective memory (remembering to do things in the future), verbal and numeric memory, and processing speed. But the benefits didn’t stop there. Over the study period, 553 participants developed dementia. However, those with high CRF levels had a 40% lower risk of developing any type of dementia compared to those with low fitness levels.
Perhaps most intriguingly, the study found that high cardiorespiratory fitness could delay the onset of dementia by about 1.5 years. This finding is particularly significant given that delaying dementia onset by even a small amount can have substantial public health implications.
Genetics Meets Fitness
One of the most compelling aspects of this research was its examination of how fitness levels interact with genetic predisposition to dementia. The researchers used a polygenic risk score – essentially a measure of genetic risk factors for Alzheimer’s disease – to categorize participants into low, moderate, and high genetic risk groups.
The surprising finding? Even among people with moderate to high genetic risk for dementia, those with high CRF levels showed a 35% lower risk of developing dementia compared to their less-fit counterparts. This suggests that staying physically fit might help offset some of the genetic cards we’re dealt when it comes to cognitive decline.
The study population was notably diverse in age and fitness levels, though predominantly white and from less socioeconomically deprived areas. This broad representation helps make the findings more applicable to the general population, although the researchers note that the results might be even more pronounced in more diverse populations.
Call to Action
The takeaway of this research are clear: maintaining good cardiorespiratory fitness isn’t just about physical health – it’s an investment in your cognitive future. While we can’t control our genetic predisposition to conditions like dementia, we can influence how our bodies respond to these predispositions through lifestyle choices.
The good news is that improving CRF doesn’t require extreme measures. Regular aerobic activities like brisk walking, swimming, cycling, or dancing can help maintain and improve cardiorespiratory fitness. The key is consistency and gradually building up your endurance over time.
As we face an aging global population and rising concerns about dementia, this research offers a hopeful message: while we can’t turn back the clock on aging, we might be able to keep our cognitive engines running smoother, longer, simply by keeping our bodies fit. It seems that when it comes to brain health, the old adage holds true – a healthy body really does promote a healthy mind.
Paper Summary
Methodology
The researchers used data from the UK Biobank, focusing on 61,214 participants who completed a six-minute submaximal exercise test on a stationary bike. Each participant’s CRF was calculated based on their heart rate response to increasing workloads during the test. The researchers also collected detailed information about participants’ lifestyle, medical history, and genetic risk factors. Cognitive function was assessed through various tests measuring different aspects of memory and thinking speed. The participants were then followed for up to 12 years to track who developed dementia.
Key Results
The study found that compared to those with low CRF, participants with high CRF had better cognitive performance at baseline and a 40% lower risk of developing dementia. High CRF was associated with delaying dementia onset by 1.48 years. Among people with moderate to high genetic risk for dementia, high CRF reduced the risk by 35%. The benefits were consistent across different age groups, though slightly stronger in middle-aged adults.
Study Limitations
The participants were generally healthier and more socioeconomically advantaged than the general population. Some people with health conditions couldn’t participate in the exercise test, potentially skewing results. The study relied on medical records for dementia diagnosis, which might have missed some cases. The submaximal exercise test, while more practical, isn’t as accurate as maximal testing for measuring CR
Discussion & Takeaways
The research suggests that maintaining good cardiorespiratory fitness could be a powerful strategy for preventing or delaying dementia, even in people with genetic risk factors. The study’s large scale and long follow-up period provide strong evidence for the protective effects of fitness on cognitive health. The findings support the importance of regular physical activity for brain health and suggest that CRF could be used as a predictor of cognitive health.
Funding & Disclosures
The study was supported by grants from the Swedish Research Council, the Swedish Council for Health Working Life and Welfare, and the Karolinska Institutet Research Foundation. The researchers declared no competing interests, and the funders had no role in the study’s design, conduct, or reporting.
Fitness
The CrossFit cure: Fitness regimen reduces need for prescription drugs, surgery
Though CrossFit is often seen as a sport for the super fit, that shouldn’t put you off from trying it. CrossFit is designed to be accessible to everyone, with scalable workouts suited for all ages and abilities, embodying its principle that the needs of elite athletes and beginners differ only by intensity, not kind. By combining strength and aerobic exercise, CrossFit can be an effective way of improving functional fitness, muscle strength and cardiovascular health.
But if that’s not enough to convince you, our latest study suggests CrossFit’s benefits for physical health may even potentially reduce the need to use prescription drugs in people living with long-term conditions. This may offer an alternative to traditional medication-based treatment for a range of health conditions, as well as potentially easing the demand on healthcare services.
To conduct our study, we recruited 1,211 people from the UK who did CrossFit. Participants ranged in age from 19-67 – though the majority of participants were in either the 30-39 (38%) or 40-49 (26%) groups. Participants were asked about their health, what prescription drugs they took and any changes in their prescriptions since starting CrossFit.
Of the 1,211 participants, 280 said they took at least one prescription drug to manage a health condition prior to starting CrossFit. Some of the most common health conditions in question included anxiety and depression, asthma, high blood pressure, Type 2 diabetes and chronic pain.
We found that 54% of participants who’d been taking a prescription drug before starting CrossFit said they decreased their dosage after starting. Among this group of 151 people, 69 reported stopping their medication entirely, while the remaining 82 said they had cut their prescription dosage by more than half. These improvements happened primarily within the first six months of training.
Younger participants, specifically those aged 20 to 29, were more likely to reduce their medication. In this group, 43% reported cutting their prescription dosage by more than half, and 27% stopped needing to use a prescription drug altogether (compared to 29% and 25% respectively across all age groups).
We also found that 40% of all participants said they required fewer visits to the doctor after starting CrossFit.
For people with long-term health issues such as chronic pain, CrossFit helped many manage their symptoms. Our study found that of those participants who reported taking painkillers prior to starting CrossFit, particularly to manage arthritis or back pain, over half reduced their medication.
Some even postponed or canceled surgeries for joint or muscular issues due to the strength and fitness they had gained after starting CrossFit. Of the 71 people who reported canceling or postponing surgeries, 55% said it was because their symptoms improved, while 31% actually reported they no longer needed surgery at all.
Benefits of CrossFit
While our study can’t directly prove that CrossFit caused these changes, the effects that CrossFit has on so many aspects of health may help explain why regular exercisers saw a decrease in their prescription drug use.
First, CrossFit is of course beneficial for physical fitness. Improvements in areas such as cardiovascular fitness and metabolic health may help in managing chronic conditions such as type 2 diabetes and high blood pressure.
Second, because CrossFit is often done as a group in a gym setting, it fosters a sense of community, team spirit and support. This sense of community may enhance mental health and wellbeing. Exercise also releases endorphins – chemicals in the brain that boost happiness and decrease pain. These two factors may help explain why a number of the study’s participants reported using fewer antidepressants after starting CrossFit.
Third, the fact that CrossFit’s combination of strength, aerobic and functional exercises helps enhance muscle strength and endurance can alleviate pressure on joints and reducing pain. The high-intensity nature of CrossFit also promotes the release of endorphins which can alleviate discomfort and enhance physical resilience, leaving participants feeling more empowered and uplifted.
As well, CrossFit emphasises movement patterns and mobility, which can help improve flexibility and reduce stiffness. All of these factors might help explain why some of the participants who’d suffered with chronic pain prior to starting CrossFit relied less on painkillers after six months of training
Nonetheless, this study has some limitations to note. The data relies on self-reported information, which can lead to biased results as participants may not accurately remember their prescription use or be influenced by their feelings about CrossFit.
Additionally, the study didn’t track other lifestyle changes participants might have made, such as diet modifications or other forms of exercise. So more research is needed to understand the full picture. Nonetheless, our findings provide promising evidence about the benefits of CrossFit that could contribute to reducing the strain on healthcare services.
Fitness
Yes, I exercise more than my daughter
‘Have fun, careful on the ice,” my 22-year-old daughter shouts as I head off for my run round the park while she loafs on the sofa before Sunday brunch with her friends. “Don’t have a fall.”
I’m not surprised to learn that middle-aged women exercise more than their daughters, with 27 per cent saying they work out at least five times a week, compared with 19 per cent of those aged 20 to 29. My routine is relentless, I realise. First it was a quick run with a friend and the dog round the park after school drop-off and before work, but then I hit 50. Now, to keep supple, there’s Pilates and yoga to fit in before 8am. And this year a girlfriend insisted
Fitness
RFK Uses Calisthenics to Show Off His Strength
ROBERT F. KENNEDY, JR. has promised sweeping changes to the nation’s approach to health following his nomination to lead the Department of Health and Human Services by president-elect Donald Trump, but one thing remains consistent: The 70-year-old will always post his bodyweight workouts to social media to highlight his Make America Healthy Again (MAHA) fitness philosophy.
The former presidential candidate recently shared a video on his Instagram and X (formerly Twitter) accounts showing off some complicated calisthenics with Ike Catcher, a bodyweight training influencer. The shirtless Kennedy, having doffed his top and tucked it into the waistband of his blue jeans, jumps up to grab the bar as Catcher performs a handstand maneuver on the top of the rig. The HHS-nominee then pulls up, rotating himself into a near-vertical inverted position, before continuing through the motion and dismounting the bar. Survivor’s “Eye of the Tiger” soundtracks the footage, which is slickly edited to include graphics as Kennedy pulls his lower body up.
“Practicing moves for my confirmation hearing,” reads the post’s caption. Kennedy’s move here isn’t a traditional exercise that targets a specific muscle group. It’s also unclear how the maneuver might factor into his confirmation hearing, during which he will likely be fielding questions about his anti-vaccine stances and his plans to shake up the agencies that would come under his jurisdiction in the office—but it does show a surprising level of shoulder mobility for a man of his age.
This type of clip is far from new territory for RFK. He’s posted videos with Catcher before, and he’s made a point to center fitness in his public messaging and persona. Back in April when he was still running for president, then-candidate Kennedy shared a post that outlines his philosophy on personal fitness as a political figure. The clip shows him pumping out pullups against the backdrop of the Gold’s Gym iconic green wall, hitting 24 reps.
This messaging has been present from the start of RFK’s bid for higher office. He launched his campaign for president on June 2023; before the end of the month, he was sharing details about his fitness regimen and how it was inextricable to his political philosophy. That first clip showed Kennedy training and urged his followers to start their own habit of morning calisthenics.
Calisthenics (or bodyweight exercises) like pushups, pullups, and air squats are an essential component to a balanced training plan. They’re more than just a starting point for resistance training with weights; you can use these movements to build muscle and develop relative strength (how strong you are in relation to your bodyweight). For guys over 50 (and beyond) like Kennedy, staying active is especially important as you age. Programs like MH‘s Max Muscle at 50, which features both bodyweight moves and exercises using gym equipment, can be a helpful guide to training safely and effectively so that you can enjoy movement and health throughout your life.
There’s some real utility in showing off these types of exercises for Kennedy, too. Almost everyone understands what it’s like to attempt a pushup or a pullup, and the sight of the 70-year-old politician pulling his chin up to the bar or pumping through reps on the ground immediately communicates vitality and capacity to the viewer in ways that other, more visually complicated exercises might not. He’s also able to drop to the floor to rep through pushups anywhere (and he usually shares these clips wearing jeans and a T-shirt, not exercise clothes, burnishing his self-professed populist cred) so the whole image portrays his readiness to engage in fitness anytime he feels the call.
“I will continue to walk the walk and lead by example,” he wrote in the first workout post’s caption, aiming to convince his audience that his personal training regimen will translate into effective leadership for the general public. How that will actually play out remains to be seen.
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