Definition of cofferdam - a watertight enclosure pumped dry to permit construction work below the waterline, as when building bridges or repairing a ship. Definition of cofferdam - a watertight enclosure pumped dry to permit construction work below the waterline, as when building bridges or repairing a ship.
Named Muscles. The specific primary muscles used in a deadlift are the erector spinae, gluteus maximus, quadriceps, hamstrings and adductors. The secondary or stabilizing muscles are the trapezius, rhomboids, flexors, extensors, serratus anterior, rectus abdominus, transverse abdominus, gluteus medius/minimus, soleus and the gastrocnemius.
Hereâs the break down of the names of the major muscle groups that the sumo deadlift works: 1  Gluteus Maximus: (Butt) 2  Quadriceps: (Upper Front legs) 3  Adductor Magnus: (Inner Thigh)  Hamstrings: (Upper back of 1  legs) Erector Spinae: (lower back)  Trapezius, upper: (upper neck muscles)