<h4>Purpose</h4>To examine associations between physical activity (PA) characteristics and psychosocial outcomes - quality of life (QoL) and fear of hypoglycemia (FH) - in children, adolescents, and young adults with type 1 diabetes (T1D).<h4>Methods</h4>In this cross-sectional study, 100 insulin pump-treated outpatients T1D completed 7-day PA logs capturing timing, type, intensity, and volume. Here, INS is linked to Hypoglycemia.