Adults in the United States gained about one pound and a half on average each month under lockdown orders during the COVID-19 pandemic, according to a new study. Researchers collected nearly 7,500 weight measurements for analysis between February and June 2020 from participants residing in 37 different U.S. states, Dr. Gregory M. Marcus, the senior author of the research letter, wrote in the study published on JAMA Network Open. The study found that 269 participants who volunteered to report their measurements experienced a steady weight gain at a rate of 0.59 pounds on average every 10 days spent under lockdown, or approximately 1.5 pounds per month. The volunteers participating in the research were all adults ranging in age from their early 30s through their early 60s, and 48.3 percent were men. “In analyzing weight trends around initial SIP [shelter-in-place], we found a significant increase in weight over the post-SIP period at a …