Higher goals helpful
Three experts commented on the study; all noted that the results are in line with previous studies, that the observational nature of the study is a limitation, and that additional randomized, controlled trials are needed to confirm the findings.
Evan Brittain, MD, an associate professor of medicine at Vanderbilt University Medical Center, Nashville, Tenn., expressed some additional concerns.
Dr. Brittain was principal investigator of a recent study that found that the relationship between steps per day and incident disease was inverse and linear for obesity, sleep apnea, gastroesophageal reflux disease, and major depressive disorder. Daily step counts above 8,200 were associated with protection from incident disease.
He noted that, in the current study, “the authors chose to make the least active quartile (25%) the reference group (only 3,967 steps/day for all-cause mortality and only 2,337 steps/day for CV mortality analysis), which somewhat lowers the bar for finding a significant benefit at higher step counts.
“Moreover, in the spline analyses, zero steps per day is used as the comparison, which is not a practical, real-world comparison,” he said. “As a result, those data are very hard to interpret, and I think are overstated.”
Like Dr. Banach, Dr. Brittain said he would continue to advise following guideline recommendations to get 150 minutes per week of moderate-intensity activity. However, he added that although it is reasonable to advise patients that benefits do accrue with daily step counts of less than 10,000, “I would not want patients to misconstrue from this study that getting more than only 2,330 steps per day is a beneficial goal.”
Martin Halle, MD, a professor in the department of prevention and sports medicine at the Technical University of Munich (Germany), said: “From a clinical, medical, and health perspective, the general population should aim for 5,000 steps, which is about 3-4 kilometers [about 2 miles] of walking, and intensity counts – the faster you walk, the better.
“I recommend doing 100 steps fast and 100 steps slow and then 100 steps fast and 100 steps slow,” said Dr. Halle, who is past president of the European Association of Preventive Cardiology. This approach not only motivates people, “but they improve their exercise capacity substantially and very quickly, just within weeks.”
European Society of Cardiology vice president and European Journal of Preventive Cardiology editor-in-chief Massimo Piepoli, MD, PhD, agreed that “little is better than nothing and more is even better. This applies to healthy subjects, as well as patients with chronic diseases.
“Five hundred steps is a very short distance (such as walking two blocks or walking the dog for about 10-15 minutes every day),” he said. Yet, increasing step counts in increments of 500 “is associated with a significant reduction in cardiovascular mortality both in men and women, particularly in older individuals.
“We do not need to depend on expensive gym facilities,” he added. “But at the same time, we need to live in and to promote the building of neighborhoods where it is possible to walk in a safe and healthy environment.”
The research received no external funding. Dr. Banach has reported financial relationships with Amgen, Daiichi Sankyo, Esperion, Freia Pharmaceuticals, Kogen, KRKA, Polpharma, NewAmsterdam, Novartis, Novo Nordisk, Polfarmex, Sanofi Aventis, Teva, Valeant, Viatris, and Zentiva, and is chief marketing and development officer at Longevity Group and chief marketing officer at Nomi Biotech.
A version of this article first appeared on Medscape.com.