New paper published in Frontiers of nutrition We argue that current public health recommendations regarding exercise and protein intake are primarily aimed at preventing deficiency diseases and do not help people achieve the best possible long-term health, independence, and quality of life. This paper addresses some fundamental questions: How much protein do people really need? What types of exercise have the greatest benefits? What does the latest research show?
Author Dr Chris MacDonald, Lucy Cavendish Fellow at the University of Cambridge and director of the Better Protein Institute, says there is growing evidence to suggest that people may benefit from higher levels of physical activity and protein intake than current guidelines typically recommend.
“Public health advice often focuses on the bare minimum that people need to do to avoid problems,” Dr McDonald says. “But many people want to know what they can do to stay strong, independent, and mentally sharp throughout their lives.”
Exercise and healthy aging
This paper reviews research linking regular exercise to a wide range of health benefits, including lower risk of death, improved mental health, enhanced cognitive function, and increased resistance to age-related decline. Evidence also suggests that combining aerobic exercise, such as walking, running, and cycling, with strength training may have particularly powerful effects.
Dr. McDonald argues that physical activity should not only be seen as a way to avoid disease, but also as a tool to maintain strength, mobility, and independence throughout life.
Protein intake above minimum requirements
This review also takes a closer look at protein recommendations. Current UK guidelines are primarily based on preventing protein deficiency in sedentary adults. However, the paper points to new research suggesting that physically active people, older adults, and pregnant women may benefit from significantly increasing their protein intake.
This review further highlights evidence that high-protein diets support fat loss (through increased satiety and thermic effects) and are beneficial for body composition as well as overall health.
Importantly, the paper points out that high protein intake is not limited to meat-based diets. With thoughtful meal planning, you can still get enough protein from a plant-based diet, as evidenced by the growing number of vegan powerlifters and bodybuilders.
From minimal health to optimal health
Rather than replacing existing recommendations, Dr. McDonald suggests supplementing them with guidance that focuses on what he calls “optimal health outcomes.” He argues that people would benefit from clearer, more practical information about how exercise and nutrition can support long-term physical and cognitive performance.
In addition to updating guidelines, Dr. McDonald believes we need to change the way society views exercise and protein intake.
“…high-intensity exercise and a high-protein diet are often associated with body builders and superficial aesthetic goals. However, high-intensity exercise and a high-protein diet can also help extend the lifespan and health span of ordinary people. So it’s not so much about having ‘abs’ or a ‘beach body’ as it is about having a strong, resilient body and mind that allows you to pick up, play with, and even remember your grandchildren.” We see the stereotypical image of a stooped, slow and vulnerable person in later life, which seems like an inevitable result of ‘father time’, but I would suggest that in most cases this is evidence of a lifestyle that is not evidence-based. That is, we should not be so quick to normalize and accept the consequences of a mostly sedentary lifestyle, but rather empower people to reverse unnecessary suffering. ”
