To the Editor We read the article entitled “Physical Activity in Children” by Michel et al with great interest. The authors described troubling trends in youth physical activity that have worsened with the recent COVID-19 pandemic. We concur with the authors that different types of physical activity, including aerobic exercise (eg, jumping rope), muscle strengthening exercise (eg, push-ups), and bone strengthening exercises (eg, playing hopscotch), offer unique health and fitness benefits to children. Among several recommendations, the authors rightly emphasize the need to include all 3 types of exercise in a child’s routine for at least 60 minutes per day. However, the authors state that weight lifting (eg, strength training with dumbbells and barbells) is “not appropriate for younger children because the strain may be too high for developing muscles, tendons, and bones.” This is far from the truth.