Getting fit takes hard work, determination, and apparently... a really flustered facial expression. John Mayer, Claire Danes and Julianne Moore are just three of the 25 stars we caught looking baffled while burning cals. Did they forget to pick up their laundry? Are they anxious about dinner plans with the in-laws? Come along for a jog, as we try to connect the dots and determine what makes these athletic celebs look so weird and confused. Check out the full gallery of all 25 stars below!