Articles tagged with Body Size
A concerning rise in adolescent obesity has been found, with overall rates climbing to 15.9% in 2023. Obesity patterns also reveal a decline in weight-loss attempts, with females more likely to attempt weight loss but fewer adolescents reporting efforts in 2023.
Both bariatric surgery and semaglutide treatment were associated with significant fat mass loss, moderate fat-free mass loss, and an improved FFM to fat mass ratio. These findings support interventions aimed at preserving muscle mass while promoting weight loss.
A study found that individuals with childhood overweight had a similar risk of coronary heart disease as those with normal weight throughout childhood and young adulthood. This has significant implications for public health planning, emphasizing early detection and treatment of childhood obesity.
A doctor warns of critical treatment gaps in eating disorders, highlighting the dangers of ignoring physical warning signs and behavioral indicators. Dr. Jennifer Gaudiani advocates for integrated medical and psychological care to address the urgent need for effective treatment.
A new study by the University of Michigan reveals that climate change is causing smaller fish in Michigan's inland lakes. Researchers found that old and young fish were significantly smaller than their typical size in 1945.
Three new Cochrane reviews found GLP-1 drugs result in clinically meaningful weight loss, but evidence on longer-term outcomes and side effects is limited. The wider use of these drugs should consider social and commercial determinants to avoid deepening existing health inequities.
A recent study published in Integrative and Comparative Biology found that bonnethead sharks' skin undergoes significant changes as they mature, with younger sharks having fewer ridges on their denticles. These changes likely improve swimming performance and protect the skin from predators or injuries.
A repeated cross-sectional study shows that cardiometabolic risk factors in Spanish children have improved over the last 30 years, with decreases in excess weight, lipid parameters, and blood pressure. The study provides valuable insights into the evolution of cardiometabolic risk in children.
A new study by Florida Atlantic University researchers found that heat does not significantly affect the cognitive ability of sea turtle hatchlings. However, higher incubation temperatures negatively impact their physical traits, including shorter incubation durations, lower hatching success, and more frequent scute anomalies. The stud...
Researchers tested a popular evolutionary theory by comparing maternal length and fetal sex in over 100,000 whales. They found that the fetal sex ratio skews female for longer body size, suggesting that female calves benefit more from heritable fitness than males do. The findings contradict the Trivers-Willard hypothesis.
A cross-sectional study found that greater lean mass and fitness are associated with fewer anxiety and depression symptoms in preadolescent children. Higher visceral adipose tissue, on the other hand, is linked to increased symptoms of both anxiety and depression.
Researchers designed an ideal primary care visit scenario that emphasizes patient-centered communication, respect, and inclusivity. A survey of 250 adults with obesity found that most preferred this approach, citing doctors who listen attentively and treat weight issues sensitively.
Research warns that GLP-1 drugs may not provide the long-term health benefit of improved heart and lung function. While they help with weight loss, patients may experience significant muscle loss, which can increase cardiovascular disease risk. Doctors are urging additional research to better understand the effects of these drugs.
A new study found that nearly one-third of individuals adopting healthy diets didn't lose weight but still experienced significant improvements in cardiometabolic markers, including increased HDL cholesterol and reduced visceral fat. The research suggests a healthy diet can have benefits beyond weight loss.
A Virginia Tech professor has received a proof-of-concept grant to further develop a chemical compound that could help promote weight loss by increasing mitochondrial activity. The compound, named BAM15, shows promise in preclinical studies without affecting food intake or muscle mass.
A study by researchers at the University of São Paulo found that women with low muscle mass have a significantly lower survival rate than those with normal muscle mass. Muscle mass is crucial for patients undergoing cancer treatment, and low levels can predict adverse outcomes, including mortality.
Larvae of wood frogs grow and mature precociously when infected with ranavirus, exhibiting accelerated growth and development. This may help tadpoles tolerate the energetic demands of infection or escape risky environments to avoid infection entirely.
A study of 350 patients found that taking semaglutide before bariatric surgery did not increase total weight loss and had similar health outcomes to surgery alone. Researchers suggest a surgery-first strategy may lead to better obesity treatment outcomes.
Engaging in 30 minutes of aerobic exercise per week modestly reduces body weight, waist circumference, and body fat measures. Aerobic training exceeding 150 minutes per week may be needed for clinically important reductions.
A comprehensive study examining over 16,000 necropsy records from 292 vertebrate species found significant differences in cancer prevalence. Cancer rates increase with body size and cellular mutation rates but decrease with longer gestation periods.
Researchers found that chimpanzees have a similarly narrow pelvis to humans, contradicting previous theories. The study proposes a new hypothesis that the obstetrical dilemma developed gradually and became increasingly exacerbated over evolution.
A large cohort study found that mothers with eating disorders were more likely to have children with psychiatric disorders, while those with pre-pregnancy BMI outside the normal range also showed an increased risk. The findings suggest that clinicians should consider these factors when preventing offspring mental illness.
A study by Florida Atlantic University and the University of Tübingen found that rainfall cools beach surfaces and enhances moisture for egg development, making it a crucial factor in determining hatchling body size. The research suggests that global warming may shorten incubation periods and disrupt growth, affecting sea turtle survival.
A team of researchers from the University of Arkansas has made a breakthrough in understanding species abundance by linking it to genome size. The study found that temperature and genome size are key drivers of diatom population growth rates, with body size still playing a role in colder latitudes.
A recent study challenges the notion that domestication is the primary driver of reduced brain size in domesticated animals. The study found that the reduction in relative brain size in domesticated dogs is not an evolutionary singularity among Canids, as other ecological and evolutionary pressures can also drive such changes.
A study found a dose-dependent association between adolescent body mass index and mental health, with the strongest link observed over time. The U-shaped relationship was consistent across sex and grade levels, highlighting the need for targeted interventions addressing body image and mental health.
A study published in Nature Communications found that the fastest animals are medium-sized, like cheetahs, due to a physical limit imposed by muscle contraction speed and shortening. This sweet spot size of around 50kg enables animals to reach speeds of up to 65 miles per hour
A study led by UMass Amherst found that increased temperatures do lead to decreased body size in fish, but gill surface area does not explain the change. The researchers challenged widely cited model projections of drastic reductions in future global fisheries yields, suggesting that models need to be reconsidered.
A new study from the University of Surrey reveals that exposure to body-positive images on social media increases body satisfaction in both men and women, while idealized imagery decreases it. Body positivity is perceived as promoting plus-size bodies more than other characteristics, but can still be beneficial for all body types.
A new study published in Palaeontologia Electronica shows the Megalodon was more slender than earlier studies suggested, changing our understanding of its behavior and impact on ancient ocean life. The revised model suggests a longer digestive canal, potentially leading to less predation pressure on other marine creatures.
New research from University of Illinois Chicago identifies a potential 'stop growing' switch triggered by steroid hormone ecdysone in fruit flies, which may relate to human puberty. The study's findings have implications for understanding the growth-stopping process in humans, particularly given recent changes in puberty onset.
A study of 15,000 dogs found that body size significantly impacts aging patterns, with smaller dogs living longer and experiencing slower decline rates. Larger dogs show an earlier onset of age-related decline but maintain cognitive health longer.
A new study found that body image dissatisfaction during pregnancy varies widely among women, influenced by complex factors such as positive and negative experiences. Negative body image can have serious effects on the mother and baby, including depression, anxiety, and poor quality interactions. The research highlights the importance ...
Researchers found that two common songbirds have smaller eyes than their counterparts from less bright outskirts, adapting to urban light. This study suggests that sensory pollutants like human-caused light may play a role in the decline of bird populations.
A new UCLA study reveals that subjects consistently perceive players in jerseys numbered from 10 to 19 as thinner than those in jerseys numbered from 80 to 89, even when body sizes are the same. This finding suggests that learned associations between numbers and sizes influence perception of body size.
Researchers from the University of Tsukuba evaluated bioelectrical impedance for estimating skeletal muscle mass in athletes, finding a strong correlation between skeletal muscle mass and impedance indices. This method also effectively estimates intracellular water levels, making it a promising tool for accurate body composition assess...
A study by Kyoto University found that Daphnia's phenotypic plasticity is strongly related to its body size and the type of predator. Medium-sized Daphnia are more vulnerable to predation by both Chaoborus larvae and fish, which prefer larger prey.
Ancient Polynesian canoe passages from Tahiti to Hawaii and New Zealand were simulated to estimate thermoregulatory energetic demands. The results show that specific body shapes and sizes contributed significantly to the voyagers' ability to withstand extreme temperatures, leading to their relative success in these long-distance journeys.
A University of Missouri study found that consumers are more likely to use virtual apparel try-on software if it is interactive and easy to use. The research suggests that making the technology versatile can reduce privacy concerns, with qualities like interactivity having a direct impact on users' willingness to shop virtually.
Scientists discovered that smaller brontotheres faced high extinction risk in crowded ecological niches, driving biased diversification towards larger sizes. This complex macroevolutionary pattern shows increased survival of larger species due to reduced competition.
A study by McGill University and University of British Columbia found that the planet's biomass is concentrated in organisms at either end of the size spectrum. The researchers discovered a universal upper limit for maximum body size across multiple species and environments, with similar sizes reached by trees, fish, and other organisms.
A study from Dartmouth College found that athletes' physique is adapted to shedding or retaining heat in certain climates, affecting their performance in Ironman events. Taller, leaner runners excel in warm climates, while stockier builds fare better in colder climates.
A new study found that male California sea lions have grown bigger as their population increased over the past 50 years. The researchers analyzed skull and bone samples to find that males expanded their ecological niche, foraging on a more diversified group of prey. This expansion allowed them to grow larger despite increased competition.
Researchers found that male sea lions have increased in size and strengthened muscles for fighting, while females' body size remained stable. They also diversified their diets to overcome food shortages and adapt to changing prey availability.
A recent UBC study reveals that the planet's biomass is disproportionately distributed among tiny and massive organisms, with no clear explanation for this pattern. The findings have significant implications for understanding climate change impacts and ecosystems.
According to a recent study, most biological life falls within these two extreme sizes, with substantial uncertainty surrounding body size and biomass across different environments. The research suggests that this pattern may be due to various factors such as energy efficiency and adaptability.
A new study of Antarctic minke whales found that a smaller whale cannot capture enough food to survive using the lunge-feeding strategy. The researchers observed remarkably high feeding rates for minke whales, especially at night, which are essential for their survival.
Research reveals island-dwelling mammal species face higher extinction risks, with those experiencing extreme size changes being particularly endangered. Human arrival on islands multiplies the probability of extinction by 16, contributing to a 'protracted extinction event' spanning over 100,000 years.
Researchers found no relationship between growth rate and body size in theropod dinosaurs, with some giants growing slowly and smaller ones rapidly. This study opens the door to future investigations into how animals regulate their growth.
A Lund University study finds that temperate regions have larger insects due to bird predation pressure and temperature, reversing a 200-million-year-old trend. This shift helps explain the global variation in body size among dragonflies and damselflies.
The cichlid fish species Lamprologous callipterus has a unique reproductive system where males are 12 times bigger than females, but also has a smaller male morph that is 60 times smaller. A new study found that the genetic mechanism underlying this size-determining sex chromosome is linked to the growth hormone regulator gene GHRHR.
A new study reveals that fishes in the deep ocean are likely to decrease in size with climate warming, which could have significant ecological effects. Researchers analyzed ancient fish otoliths to track changes in body size over glacial and interglacial periods.
A study by McGill University researchers found that Northern Tree Shrews' body size increased with warmer climates, contradicting Bergmann's rule. The team analyzed museum specimens and historical climate data, revealing a reversal of the Island rule as well, highlighting the complex interaction between ecological factors.
A new study of twins found that consistent exercise can change the molecules in the human body that influence gene behavior, leading to lower signs of metabolic disease. The study suggests that markers of metabolic disease are strongly influenced by how a person interacts with their environment, rather than just their inherited genetics.
A randomized clinical trial of 8,800 school-age children with high vitamin D deficiency showed no impact on growth or pubertal development after 3 years of weekly oral vitamin D administration. Vitamin D deficiency is associated with stunting and obesity in children.
Researchers at the University of Ottawa have discovered that patients with electrolyte abnormalities are twice as likely to be diagnosed with an eating disorder. This study analyzed Ontario health data between 2008 and 2020, identifying a potential preventative treatment for approximately 1 million Canadians.
A recent study found that ocean cooling over the past 100 million years led to increased body size in tetraodontiform fishes, adhering to Cope's and Bergmann's rules. The researchers combined genomic and fossil data to support this finding, which was previously less well understood for ectothermic species.
Clown anemonefish control their growth to match larger anemones, growing faster than fish on smaller anemones. This mutualistic interaction allows for optimized reproductive value in their environment.
A study published in Scientific Reports found that mammals with larger brains than similar-sized species were more likely to have survived extinction. The researchers investigated brain sizes of 291 living mammal species and 50 extinct species, discovering a significant correlation between brain size and survival.
A study involving 6,500 participants found a significant association between higher childhood body mass index and increased risk of premenstrual disorders. Young adults with higher childhood BMI experienced greater levels of premenstrual symptoms.