A New Mindset in Treating the Global Obesity Crisis

According to the World Obesity Federation (WOF), three billion people worldwide are currently living with overweight or obesity, costing the global economy $1.73 billion annually. That number is expected to grow to $4 trillion by 2035. More tragically, WOF estimates that obesity-related chronic health issues account for over five million deaths globally.

These alarming statistics are aligned with data from other global and national health organizations, leading to a renewed call to take urgent action against obesity.

According to Johanna Ralston, CEO of WOF, reducing obesity rates also calls for a fresh approach. In a recent HFA Pod episode, "A New Framework for Obesity Prevention and Care," Ralston spoke with HFA Vice President of Research Anton Severin to explore how the global conversation around obesity is evolving and why lasting success requires more than any single intervention alone. (The episode was released on July 9, 2026.)

A Multi-Pronged Approach

Ralston’s path to the obesity field was shaped by decades of work across global chronic disease, including six years as CEO of the World Heart Federation and earlier work on cancer control with the American Cancer Society.

What drew her to the field of obesity, she says, was the growing recognition that there is much more to this condition than simple lifestyle choices—a view reinforced by a personal family experience that cast obesity as much more metabolically complex than is often assumed. When the opportunity arose to lead WOF, she embraced it.

Ralston identifies three distinct approaches that need to be part of the discussion:

• GLP-1 therapies;

• metabolic health; and

• relying on a variety of treatments rather than an either/or framework.

She emphasizes that prevention, medication, and physical activity are not competing priorities but complementary ones. She also challenges the perception that obesity is primarily a problem in wealthy countries: Nine of the world’s 10 most affected countries by population are middle- or lower-income nations.

The arrival of GLP-1 therapies, Ralston acknowledges, has been genuinely transformative—accelerating recognition of obesity as a disease and demonstrating benefits well beyond weight loss, including cardiovascular and neurological health and cancer prevention. But she shares concerns about fragmented delivery, particularly through telehealth and online channels, where patients may not receive adequate support for complementary interventions like structured exercise and nutrition.

She points to HFA’s new economic analysis, conducted with FTI Consulting’s Center for Healthcare Economics and Policy, as an important contribution to this argument. Pairing GLP-1 treatment with structured exercise produces better health outcomes and significant downstream economic value compared to medication alone—a framing she describes as “especially clear” in making the case for investing in the comprehensive approach.

When asked what it would take to move from collaboration to genuine integration of fitness and healthcare, Ralston draws on her own experience managing multiple sclerosis to illustrate how the clinical and fitness worlds can feel distant and why bridging that gap matters.

She recommends that fitness professionals engage with WOF’s SCOPE program (Strategic Centre for Obesity Professional Education), a largely free, online certification covering the science of obesity, implicit bias, and how to communicate with people living with the disease. She sees initiatives from other global health organizations, such as the WHO Acceleration Plan to Stop Obesity, as taking a more integrative approach.

Most importantly, she argues for centering the voices of people with lived experience of obesity—those who were blamed and stigmatized for what is now understood as a complex chronic disease—as both allies and experts in shaping what effective, integrated care looks like.