Patients with prediabetes who also have obstructive sleep apnea may improve their resting heart rate by using CPAP, reports News Medical.

People with prediabetes have blood sugar levels higher than normal but below Type 2 diabetes levels. People with OSA experience times during sleep when air is obstructed from flowing normally into the lungs. CPAP is considered the “gold standard” treatment for OSA.

According to Sushmita Pamidi, MD, lead study author and a sleep physician-scientist at McGill University, previous studies have found that OSA is associated with increased sympathetic activity, which activates our “fight or flight” response. This response, in turn, raises our heart rate.