NewsMakers
Training breathing muscles could have longer lasting benefits than previously thought
The strength gains to the muscles from five weeks of inspiratory muscle training (a form of weight training to strengthen the muscles used to breathe) persist for five weeks after the training has stopped.
Training the breathing muscles (primarily the diaphragm which plays a vital role in breathing) could have longer lasting benefits than previously thought. The strength gains to the muscles from five weeks of inspiratory muscle training (a form of weight training to strengthen the muscles used to breathe) persist for five weeks after the training has stopped, according to new research published in Experimental Physiology.
Stronger breathing muscles may improve the distribution of blood flow during exercise, which allows a person to undergo physical activity for longer periods before tiring and becoming less breathless. Enhancing breathing muscle function can potentially help people manage and slow down the progression of chronic obstructive pulmonary disease (COPD), a group of lung conditions including emphysema and bronchitis. The disease is the third leading cause of death worldwide1 but is helped with pulmonary rehabilitation which can include inspiratory muscle training. Healthcare needs and the frequency of hospital visits depends on a person’s symptoms and how regularly they worsen. For people with weak breathing muscles, the training may help relieve the symptoms.
Muscles can lose function or weaken over time with disuse, particularly the respiratory muscles which may weaken faster than the other muscles in the body. The researchers from University of Waterloo, Canada foundthat the breathing muscles remain stronger after an equal amount of time without training, in this case five weeks. By observing similar muscle gains between weight training of the breathing muscles with that of the tibialis anterior (the muscle that runs down the front of the shin) indicates that the respiratory muscles can be trained like other skeletal muscles.
Paolo Dominelli, University of Waterloo, Canada, a researcher on the study, said, “Inspiratory muscle training can be beneficial to people with breathing difficulties and can be part of pulmonary rehabilitation. Knowing the time frame before muscle function loss occurs could help inform treatment programs, determining how frequently an individual would need to train and the length of the programme.”
Inspiratory muscle training also caused a positive change to the respiratory muscle metaboreflex, a process where the body restricts the blood flow to the limbs when the breathing muscles tire. Typically during exercise when the limb muscles are working hard, the respiratory metaboreflex prioritises blood flow to the breathing muscles to ensure breathing is maintained. As a result, heart rate and blood pressure rise. However, inspiratory muscle training reduces the metaboreflex, which lowers the heart rate and blood pressure. Reducing the metaboreflex may improves a person’s endurance during exercise, meaning they can workout for longer before reaching exhaustion. The researchers found that the effects on the metaboreflex were preserved after five weeks in the absence of training.
Paolo Dominelli said, “By showing that the strength of the breathing muscles persisted, along with the retained reductions in the respiratory metaboreflex after five weeks without training suggests that the training itself may not need to be continuous. We would need to carry out subsequent clinical trails to test the appropriate frequency and length of training required to evaluate how long the health benefits persist.”
A group of 16 young healthy adults were randomly assigned into either the control group (seven male, one female) or the experimental group (six male, two female). Over 10-weeks their respiratory muscle strength and muscle strength of their lower leg (via the ability to flex the ankle upwards) were tested in a laboratory, and their blood pressure and heart rate were measured at pre-training (zero weeks), post-training (five weeks) and post-detraining (10 weeks) while their respiratory muscles were working hard to elicit the metaboreflex.
Over five weeks the experimental group performed inspiratory muscle training twice a day for five days a week. This was then followed by five weeks of undergoing normal physical activity but no inspiratory muscle training (post-detraining). The control group did not take part in inspiratory muscle training. All participants engaged in regularly physical activity (approximately three days per week) throughout the 10-week study period.
Paolo Dominelli cautions, “Firstly, our study was done in young healthy individuals who are not limited by their respiratory muscles. Follow-up studies needs to be completed in those with lung disease such as COPD. Secondly, the main limitation of the study was the duration of the detraining (no training) period. It was only for five weeks, the same amount of time as the training, where we did not see any decreases in breathing muscle strength. Further studies should extend the detraining phase to see if the reduction in the metaboreflex still persists with decreases in muscle strength.”
Beauty & Fashion
Redefining aesthetics: From anti-aging to healthy aging
Growing attention is now being given to healthy aging, understanding how the entire face changes over time, preserving facial harmony, and helping people continue to look like themselves.
For decades, “anti-aging” has defined the beauty and aesthetics conversation, promising to erase wrinkles and reverse the signs of time. Today, that conversation is shifting.
Aging is no longer just about looking younger. Growing attention is now being given to healthy aging, understanding how the entire face changes over time, preserving facial harmony, and helping people continue to look like themselves.
A review published in Facial Plastic Surgery, The Anatomy of the Aging Face: A Review, describes aging as changes across bone, ligaments, muscles, fat, and skin. Another review in Aesthetic Surgery Journal, The Facial Aging Process From the “Inside Out”, explains how changes beneath the surface eventually become visible on top.
Studies in Plastic and Reconstructive Surgery show facial fat is organized into distinct anatomical compartments that can lose volume and shift position over time, altering facial shape and balance.
For multi-awarded aesthetic physician Dr. James Co, founder of Cosma Institute and Architect of Aesthetic Confidence, these findings are the reason aesthetic care must start with understanding, not just treating.
“Aging is not a disease we need to cure,” Co said. “It is a biological process. As physicians, our role is to understand what is changing beneath the surface, how those changes differ from person to person, and whether intervention is appropriate in the first place.”
“When you only look at the wrinkle, you are looking at the surface of a much bigger anatomical process,” he added. “The face ages as a system. Good assessment means understanding what is happening underneath before deciding what should be done on the surface.”
Part of that understanding is recognizing that no two faces age the same way. Two people can be the same age and experience aging very differently. Genetics, skeletal structure, fat distribution, skin characteristics, sun exposure, lifestyle, and environmental factors all influence how aging presents.
“Two patients can be the same age and come to me with completely different anatomy, lifestyles, concerns, and goals,” Co said. “Why would we expect their treatment plans to look exactly the same?”
This is where healthy aging broadens the conversation — from fixing isolated signs to looking at the face as a whole and listening to what the individual actually wants.
“Someone can want to look refreshed without wanting to look 20 years younger,” Co said. “Those are completely different goals.”
Rather than trying to freeze one version of the face forever, healthy aging acknowledges that the face will continue to change. As different structures change at different rates, the relationship between features evolves. Facial harmony is therefore not fixed.
“You cannot freeze one version of your face forever,” Co said. “But you can understand how the face is changing and make decisions that respect its natural proportions and your identity.”
In the age of social media, where aesthetic treatments are highly visible, Co cautions against self-diagnosis.
“Patients should not have to diagnose themselves from social media,” he said. “You might recognize a concern, but deciding why it is happening and what should be done about it requires proper assessment.”
The shift is also about how people feel, not just how they look. A 2022 review on minimally invasive facial aesthetic procedures found studies are increasingly looking beyond physical changes to include satisfaction with appearance and aspects of psychological and social well-being, while noting that evidence still needs careful interpretation.
For Co, this reinforces that success is not always about looking dramatically younger.
“We need to ask whether the result makes sense for the patient, whether expectations were met, and whether we preserved the things that make that person recognizable,” he said. “I would rather someone tell my patient, ‘You look well,’ than immediately ask, ‘What did you have done?'”
At Cosma Institute, Co applies this consultation-led philosophy through individualized assessment, facial harmony, medical judgment, and patient education. Having trained aesthetic practitioners across Southeast Asia and Europe, he advocates for natural-looking outcomes that respect the characteristics already present in each face — an approach that recently earned him two awards at the Merz Aesthetics Tala Awards.
For Co, the evolution of aesthetic medicine is not about having more tools, but knowing when to use them — and when not to.
“Aging cannot be stopped, and I don’t think that should be the promise,” he said. “What we can do is understand it better. We can look at the science, understand the anatomy, listen to the patient, and make decisions that allow them to age while still looking recognizably like themselves.”
For Co, healthy aging begins not with fighting age, but with understanding it.
NewsMakers
The look and feel of your neighborhood may affect your sleep
Those living in neighborhoods rated as having a stronger sense of safety tended to sleep longer, and that this rating appeared to be shaped by the streetscape.
Your neighborhood’s “streetscape”—the physical environment of your street—is something that you have probably never consciously thought about, despite seeing it every day. But what if the streetscape was affecting you on a subconscious level and disrupting your sleep?
This intriguing question is posed by the findings of a study led by Professor Daisuke Matsushita of the Graduate School of Human Life and Ecology at Osaka Metropolitan University. The research team used AI to analyze more than 200,000 Google Street View images to identify visual neighborhood characteristics. They then linked these characteristics to the self-reported sleep of 1,089 working adults living on the lower floors of apartments in Tokyo, who were most likely to be affected by the streetscape.
They found that those living in neighborhoods rated as having a stronger sense of safety tended to sleep longer, and that this rating appeared to be shaped by the streetscape. Generally, people slept longer in areas with lots of greenery, such as leafy trees, on the street. Similarly, high “enclosure”—meaning many tall vertical buildings and few wide-open spaces—was also associated with longer sleep and fewer insomnia symptoms.
However, the study also made a surprising finding. The researchers found that highly walkable streetscapes, such as those with more sidewalks and traffic signs, were associated with a lowered sense of safety and shortened sleep duration.
This suggests that walkability does not always represent a reassuring environment. Instead, a possible explanation is that streets with extensive pedestrian infrastructure are often busier, more crowded, and used by more strangers, which may be perceived as less safe or less relaxing than quieter residential streets.
“This study demonstrates the potential for evaluating streetscape characteristics across large geographic areas in a cost-effective manner,” Dr. Matsushita said. “Based on the technique used in this study, cities could potentially measure perceived safety, beauty, liveliness, and enclosure as well as pollution and noise.”
“We hope that opening up this new perspective creates further possibilities for designing healthier neighborhoods,” he concludes.
The findings were published in Building and Environment.
NewsMakers
Workout or nap? Either can help your sleepless brain, study finds
People who either completed 20 minutes of moderate-to-vigorous exercise or took a 90-minute nap performed about 22 per cent better on memory tests after 30 hours without sleep than those who did neither.
A short workout or a nap can help protect memory after a sleepless night, a McGill University-led study has found.
Researchers found people who either completed 20 minutes of moderate-to-vigorous exercise or took a 90-minute nap performed about 22 per cent better on memory tests after 30 hours without sleep than those who did neither. The findings, published in Proceedings of the National Academy of Sciences (PNAS), point to practical ways to counter the effects of sleep deprivation.
“Sleep loss affects nearly every aspect of how we think and function, but many people can’t simply stop what they’re doing and get more sleep,” said senior author Marc Roig, Professor in McGill’s School of Physical and Occupational Therapy. “Our findings show that even a brief bout of exercise may help preserve one of our most important cognitive abilities.”
The study involved 54 healthy young adults who stayed awake for 30 consecutive hours under lab supervision. Participants were then assigned to one of three groups: a 20-minute cycling session, a 90-minute nap or a control condition. Three days later, researchers tested their memory for images they had viewed immediately after the intervention. Those who exercised or napped remembered significantly more images than participants who did neither.
Same result, different pathways
While the memory benefits were nearly identical, brain recordings revealed that exercise and napping helped in different ways.
Napping appeared to help the brain recharge, making it easier to take in and remember new information. Exercise, by contrast, helped the brain use its remaining resources more efficiently, without making participants feel more tired.
The findings could eventually inform fatigue-management strategies in workplaces where sleep loss is common and mistakes can have serious consequences, such as health care, transportation and emergency response.
“A nap isn’t always possible in the middle of a shift,” said first author Madhura Lotlikar, a doctoral candidate in McGill’s Department of Neurology and Neurosurgery. “Exercise is accessible, inexpensive and easy to implement. That makes it a promising tool to help people stay cognitively sharp when sleep is limited.”
The researchers emphasize that exercise cannot replace sleep, but it may help people function better when getting enough rest isn’t possible.
About the study
“Protecting episodic memory after sleep loss: Similar benefits of exercise and naps via distinct neural contributions” by Madhura Lotlikar and Marc Roig et al., was published in Proceedings of the National Academy of Sciences of the United States of America.
