Check for a label or weigh one to be sure. Olympic Barbell Curl Bar EZ Bar 4/5/6/7 FT Barbell Bar 300/400/500/600 Weight Capacity Strength Training Bar for Home Gym These are the wiggly ones.

As barbell back exercises go, bent over rows are certainly up there. You can load up the bar and shift enough weight to build a broad, resilient and wide back, while also challenging your glute ...