Fitness
The ‘disgustingly small’ amount of exercise each day that slashes the risk of cancer: fitness expert
Exercising a “disgustingly small” amount per day can lower the risk of cancer, according to a fitness expert.
Nutritional scientist and professional bodybuilder Dr. Layne Norton claimed that “four minutes of vigorous activity a day” will greatly reduce an individual’s cancer risk.
“Exercise is one of the only things that you can do, independent of weight loss, that will improve all your health parameters,” Norton told host Dr. Rhonda Patrick on the FoundMyFitness podcast last week.
Citing a study published last year in JAMA Oncology, Norton said that researchers found that “vigorous physical activity” done “cumulative” throughout the day can lower the risk of cancer by 20%.
“I got in trouble because I called it a disgustingly small amount, but it really is,” the fitness expert shared.
He went on to reveal that the study found that exercising for “10 minutes” daily dropped the risk of cancer by 30%.
The study also found that just three short bursts of exercise per day can lead to a 40% reduced risk of cancer and cancer death and a 50% reduction in heart disease death.
“If you just go walk vigorously for 30 minutes in a day you’re killing it,” the nutritional scientist said.
While some may question the findings because it was a “cohort study,” Norton quickly pointed out that “randomized control trials” have found similar indications to exercise and cancer risk.
“We have randomized control trials looking at very short bursts of exercise, seeing improvements in glucose metabolism, blood lipids, inflammation, and then now the cognitive stuff too,” Norton shared.
The fitness guru also shared that short periods of exercise have been shown to improve mental health.
He explained that the “randomized control trial” found that men with “major depressive disorder or general anxiety disorder” who did two 25-minute sessions of resistance training a week for eight weeks saw “significantly improved symptoms.”
“The effect size for major depressive disorder was 1.7,” Norton said, citing a study released last year in Psychiatry Research.
“For those who aren’t familiar with effect sizes, .2 is a small effect size, 0.5 is modest, and 0.8. Anything above 0.8 is considered large, 1.7 is massive,” Norton said.
Selective serotonin reuptake inhibitors (SSRI) — a class of drugs that are commonly prescribed to treat depression — usually fall between 0.3 to 0.8, and “the best you see is about 0.8,” he shared.
The professional bodybuilder clarified he wasn’t suggesting people should stop taking their SSRIs instead of working out but to consider other additional options to add to treatment — like exercising.
“I’m not saying we should get rid of SSRIs and have everybody exercise because sometimes maybe someone needs an SSRI just to get out of bed and actually go exercise,” Norton said. “But if we’re looking at how powerful that lever is, that’s amazing.”
However, nutritional scientists understand that getting started with routine exercise can be challenging and suggest that listeners consider it like “brushing your teeth.”
“Do you feel motivated to brush your teeth? No, you do it because you know if you don’t brush your teeth, they’re going to go to crap,” Norton said. “The same thing happens with your body if you don’t exercise.”
According to Johns Hopkins cardiologist Dr. Seth Martin, the average resting heart rate is between 60 and 100 beats per minute (BPM).
The “sweet spot” for exercise depends on a person’s age, and the target heart rate is “usually between 50 percent and 85 percent” of their maximum safe heart rate.
For a 50-year-old, it’s crucial to calculate the maximum heart rate, which can be obtained by subtracting the age from 220. In this case, it’s 170 BPM, Martin shared.
If someone aims for a 50% exertion level, their target should be 50% of that maximum, 85 BPM.
However, if a person wants to push themself to 85% of the maximum, their target should be 145 BPM.
The target heart rate that a 50-year-old should aim for during exercise is 85 to 145 BPM.
Martin noted that it’s important not to “get overly fixated on numbers” and instead just strive to exercise regularly.
Fitness
New Research Suggests Five Minutes of Extra Exercise a Day Could Lower Blood Pressure
High blood pressure (hypertension) is one of the most common causes of premature death worldwide. And while we’re well aware that frequent exercise can help combat high blood pressure, the good news is that new evidence suggests that just 5 minutes of extra movement could make a significant difference to our heart health and even potentially reduce those risks.
The study published in Circulation analysed health data from 14,761 participants to examine how swapping one type of movement with another was associated with changes in blood pressure. During the intervention, the participants from five different countries wore an accelerometer device to measure their activity and blood pressure throughout the course of the day and night.
The participant’s daily activity was split into six categories:
- Sleep
- Sedentary behaviour (sitting)
- Slow walking
- Fast walking
- Standing
- Vigorous exercise (running, cycling or stair climbing)
The researchers measured what would happen if a participant changed various amounts of one behaviour or another in order to estimate the effect on blood pressure.
They found that replacing sedentary behaviour with 20-27 minutes of exercise per day by uphill walking, stair climbing, running and cycling, was estimated to lead to a significant reduction in blood pressure and could potentially reduce cardiovascular disease by up to 29%.
The study also indicated that just five minutes of activity a day was estimated to potentially reduce blood pressure.
According to joint senior author Professor Emmanuel Stamatakis, ‘High blood pressure is one of the biggest health issues globally, but unlike some major causes of cardiovascular mortality there may be relatively accessible ways to tackle the problem in addition to medication.’
‘The finding that doing as little as five extra minutes of exercise per day could be associated with measurably lower blood pressure readings emphasises how powerful short bouts of higher intensity movement could be for blood pressure management,’ he explained.
First author Dr Jo Blodgett added, ‘For those who don’t do a lot of exercise, walking did still have some positive benefits for blood pressure. But if you want to change your blood pressure, putting more demand on the cardiovascular system through exercise will have the greatest effect.’
Fitness
Postpartum Exercise Cuts Odds of Postpartum Depression
THURSDAY, Nov. 7, 2024 (HealthDay News) — Odds of postpartum depression are reduced by 45 percent in individuals who engaged in postpartum exercise, according to a review published online Nov. 5 in the British Journal of Sports Medicine.
Andy Deprato, from the University of Alberta in Edmonton, Canada, and colleagues conducted a systematic literature review to examine the influence of postpartum exercise on maternal depression and anxiety.
Based on 35 studies (4,072 individuals), the researchers found with moderate-certainty evidence that exercise-only interventions reduced the severity of postpartum depressive symptoms (19 randomized controlled trials [RCTs]; standardized mean differences [SMDs]: −0.52; I2 = 86 percent; moderate effect size) and anxiety symptoms (two RCTs; SMD: −0.25; I2 = 0 percent; small effect size) and the odds of postpartum depression (four RCTs; odds ratio, 0.55; I2 = 0 percent) versus no exercise. Postpartum individuals needed to accumulate at least 350 MET-minutes/week of exercise (e.g., 80 minutes of moderate-intensity exercise such as brisk walking, water aerobics, stationary cycling, or resistance training) to achieve at least a moderate reduction in the severity of postpartum depressive symptoms.
“These data support the engagement in postpartum physical activity to prevent or improve depressive symptoms as a low-cost and acceptable intervention,” the authors write.
Abstract/Full Text
Fitness
This easy, low-impact exercise ‘significantly’ reduces low back pain — and it’s free
Step it up.
The health benefits of a daily walk are well established; a constitutional walk reduces the risk of heart disease, lowers blood pressure and LDL (the “bad” cholesterol), reduces stress, boosts immunity, and improves digestion.
Now, a new study adds yet another reason to get your steps in.
Publishing in The Lancet, researchers found that participants who took a 30-minute walk five times a week reported less back pain and fewer medical visits than their stationary counterparts.
Per the study, almost seven in ten people who recover from an episode of lower back pain will experience a recurrence within the following year. Yet after experiencing back pain, these regular walkers were pain-free for almost twice as long as those who stood still.
Low back pain is estimated to affect 619 million people globally in 2020 and is projected to increase to 843 million people by 2050.
In terms of preventing lower back pain, Dr. Jason Lipetz, chief of spine medicine at Northwell Health in Long Island, previously told The Post that picking up children and other heavy items is often the root of the problem.
“Bending over at the waist puts pressure on the discs of the spine and can cause pain,” Lipetz says. “Also, things like riding a bike with the seat too low, even getting in and out of a car, can make you lift the knee too high, putting extra pressure on the spine and contributing to lower back pain.”
Experts believe younger generations are experiencing an influx in back pain due to inactivity and sedentary jobs, especially those that involve looking down at smartphones, laptops and tablets for hours a day.
As an anecdote to the negative consequences of inactivity, walking is a free, low-impact alternative to running or other high-intensity workouts. It is practical, accessible, and may help you live a longer, richer, less pained life.
Recent research found that walking 5,000 steps three times a week for two years could increase a person’s life expectancy by three years and decrease their healthcare costs by up to 13%.
The U.S. Department of Health and Human Services recommends 150 to 300 minutes of moderate-intensity aerobic exercise per week in its physical activity guidelines. A 30-minute walk on weeknights gets steppers within that range.
Research suggests that a brisk pace may be better than a slower stride in lowering the risk of developing type 2 diabetes.
For those looking to amplify their stroll’s aerobic intensity and calorie burn, experts recommend incorporating weights and interval training, walking to the beat of a fast-paced song, and/or walking on an elevated terrain or along a path with hills.
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