背中トレ 4/15 Contents: Pull-up: 3sets 10reps Bent Over Rowing: 65kg 4sets 10reps Lat Pull Down: 47kg 3sets 10reps Closed Grip Lat Pull Down: 47kg 3sets 10reps Dumbbell Shrug: 26kg/each 4sets 15reps Super Set (Biceps) Incline Dumbell Curl:…