Weight lost in the 50s went with healthier heart checks at 62, study finds

Many people put on weight in middle age, and many find it hard to take off. A new study from the UK asked whether weight loss in middle age shows up later in heart health checks. In 6,309 people, the answer was a careful yes [1].

People who lost weight between ages 50 and 55 had heart checks at 62 much like people who had never been heavy. People who gained weight had higher blood pressure. Their top blood pressure number rose about 6 points more than it did in people who stayed a healthy weight [1].

This shows a link, not proof. Very few people lost weight, so the numbers for that group are shaky. The paper is also a preprint, which means it has not yet been checked by other scientists [1].

The work was led by Charis Bridger Staatz of University College London, with George Ploubidis as senior author. It was posted on medRxiv, a site for early papers, in August 2026. It was funded by the UK's Economic and Social Research Council and the NIHR University College London Hospitals Biomedical Research Centre [1].

Who was in the study?

Everyone in it was born in Great Britain in a single week in March 1958. This group is called the National Child Development Study. Researchers have checked in with its members again and again since birth, from school tests in childhood to a nurse visit in their 40s [2].

For this paper, the team looked at how weight changed between ages 50 and 55. Then they looked at checks taken at age 62. These covered blood pressure, heart rate, two kinds of cholesterol, blood fats and a test of long term blood sugar. They also measured CRP, a marker in the blood that rises when there is swelling, or inflammation, in the body [1].

The team also used the same people's checks from age 44. That let them ask how fast each person's results got worse over the years, not just where they ended up [1].

What did the study find?

Heart checks tend to slip with age for everyone. People who gained weight into obesity, or gained more while already living with it, slipped faster than people who stayed a healthy weight. Their top blood pressure number rose by about 6 more points, and their swelling marker rose more too [1].

People who lost weight from obesity told a different story. Their results slipped at about the same pace as those of people who had always been a healthy weight. The authors put it this way:

Those who lost weight from obesity had similar rates of cardiometabolic biomarker deterioration to the healthy weight group.

Bridger Staatz and colleagues, medRxiv, 2026 [1]

In plain words, the heart and blood checks of people who lost weight kept pace with those of people who were never heavy. Cardiometabolic is a word for the heart, the blood vessels and the way the body handles sugar and fat [1].

What does the study not show?

The paper's own numbers are less firm than that summary sounds. For blood pressure, the weight loss group came out about 1 point higher than the healthy weight group. But the true answer could lie anywhere from about 7 points lower to about 8 points higher. A range that wide means the study cannot tell the two groups apart well, which is not the same as showing that they match [1].

The range is wide because so few people lost weight. The paper gives the two weight loss groups only as shares of the whole, and each held fewer than 4 in 100 people. A separate paper by the same team found that only about 13 in 100 people with obesity in this group had lost weight by their 50s [1][3].

A study like this one watches people rather than asking some of them to lose weight. So it cannot say that losing weight caused the better checks. People who lose weight may differ in other ways. The same team found, for example, that people with less money were more likely to keep gaining [1][3].

An earlier trial is a reason for care. In the Look AHEAD trial, 5,145 American adults with type 2 diabetes were put by chance into a weight loss program or a support and education group. The program group lost more weight and, at least at first, had better blood pressure and blood sugar. By contrast, it did not cut heart attacks, strokes or heart deaths over almost 10 years [4].

So this work does not show that losing weight in the 50s prevents heart attacks, because it did not count them. What it does show is narrower. In one large British group, people who gained weight in their early 50s had worse heart checks at 62. The small number who lost weight looked much like people who had never been heavy [1].