Abstinence rate doubled
The study’s primary endpoint was abstinence, defined as biologically verified 7-day point prevalence abstinence.
Results at 6-month follow-up showed that the primary endpoint was achieved by 27.6% of the higher-intensity intervention group, compared with just 14.8% of the lower-intensity group (odds ratio, 2.2; P = .005).
“It was encouraging to see we roughly doubled the abstinence rate at the 6-month follow-up,” Dr. Smits said. “Those receiving the high-intensity exercise intervention had greater abstinence rates spanning the entire study period versus the standard treatment.”
Of note, declines in anxiety sensitivity, as measured on the Reiss-Epstein-Gursky Anxiety Sensitivity Index, were observed in both groups. However, there was no significant difference in changes between the two groups.
Dr. Smits noted the investigators initially speculated that exercise would improve cessation success in individuals with anxiety sensitivity by providing exposure to the types of sensations that may trigger their anxiety, such as sweating and an accelerated heart rate, providing an opportunity for “extinction training” by desensitizing them to these experiences.
In addition, high-intensity exercise may also mitigate other anxiety symptoms, including panic disorder, pain, depression, overeating, and posttraumatic stress disorder, Dr. Smits said.
Real-world evidence
Commenting on the findings, Sahib S. Khalsa, MD, PhD, director of clinical operations at the Laureate Institute for Brain Research and associate professor at the University of Tulsa, Oklahoma, noted that the real-world nature of the study suggests its results are widely applicable.
Dr. Sahib Khalsa
It is also important to note that both the current and previous studies conducted by the investigators included NRT, “and thus the effects are more likely to be reflective of a grouping of therapies, something that is more reflective of current practice,” said Dr. Khalsa, who was not involved in the research.
He noted that initiating as well as maintaining exercise motivation over longer periods is challenging.
“The study likely addressed this challenge by using fitness instructors, which may be an important criterion for successful deployment of the intervention. We also don’t know whether maintaining an active exercise regimen is critical to maintaining smoking cessation,” Dr. Khalsa added.
Dr. Smits is a consultant for Big Health. Dr. Khalsa has reported no relevant financial relationships.
A version of this article first appeared on Medscape.com.