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.
Muscles Worked. Both exercises place major emphasis on your posterior chain -- the group of muscles that comprises your hamstrings, glutes, adductors and lower back. Squats are slightly more quadricep-dominant, however, while deadlifts rely more on the hamstrings and also work your upper back, grip and forearm muscles.hey're not just for powerlifters though -- you can benefit from squats and deadlifts if you're training for general strength, bodybuilding, weight loss or athletic performance. While they both appear to be completely different, building a bigger squat can actually help your deadlift enormously.