Public Citizen is but one advocacy group opposed to retaining the current HOS rules, with Lena Pons, a policy analyst for the group, declaring that FMCSA "must consider the cumulative negative health effects of these rules on truck drivers." She said the rules promote "expanded driving" at the expense of time for rest, family life, and exercise. "Clearly, these rules are a significant detriment to the health of truck drivers," Pons noted in her testimony.