DEADLIFTS AND SQUATS part 1

PURPOSE

The purpose of this article is to help clarify the technical requirements necessary for safe execution of the deadlift and squat family. There is some confusion regarding the principles of these movements. Difficulty in performing these exercises can be the culmination of several factors to include the skill level of the athlete, effectiveness of their training sessions, and comprehension of movement cues³.

SAFETY

Safety is always paramount in any resistance training program. The use of a spotter(s) is important when training with free weights. The job of the spotter is extremely important therefore they should be a knowledgeable individual who can assist in the proper execution of the exercise. The spotter is charged to ensure the athlete completes each repetition with good form and assist in completion as needed.
DO NOT ATTEMPT TO LIFT MORE THAN YOU ARE CAPABLE WITH EXCELLENT TECHNIQUE. A breakdown in technique is synonymous with bio-mechanical failure. There may have been a critical shift in prime mover recruitment that may lead to joint dysfunction and injury.

POSTURE

The hip hinge

The optimal alignment of the body will enable the athlete to produce the greatest force with minimal impact on the lumbar spine. Poor posture during the deadlift will increase stress on the lower spine L-5 to S1. There is no “magic position” that fits all lifters. However, the strength and conditioning professional should train the lifter to obtain a natural lumbar curve with a slight flattening of the back. Terminate the exercise in the event of posture failure. The lifter should be instructed to stop and reset by bracing, drawing-in, and pulling shoulder blades together (scapular retraction). The lifter should practice getting into proper lifting posture before attempting to lift from the floor. It is acceptable to elevate the load if proper lifting posture is difficult to obtain. The majority of persons will find it easier to obtain the sumo deadlift position (feet wide and hands inside knees) compared to the conventional deadlift⁷. The Sumo deadlift promotes a neutral spine and minimizes segmental movement⁸. Some texts will indicate a slight to hyperextension of the neck as part of starting posture. It is recommended to maintain a natural neck position. Cervical stability is important to prevent altered reciprocal inhibition between cervical flexors and extensors. Inactivity of the deep cervical flexors resulting from the overuse of cervical extensors may contribute to head protrusion and chronic neck pain¹⁰.

THE HIP HINGE    

The deadlift requires the technical ability to perform the hip hinge movement with spinal stabilization⁶. The hips should travel backward as the shoulders move forward maintaining spinal neutrality. The knees should remain virtually vertical. A common error is the bending forward of the thoracic spine instead of initiating the movement at the hip. Attempting to load the musculoskeletal system in this fashion will increase forces in the spine and reinforce faulty movement patterns. Mastery of the technique is crucial for progression toward Olympic lifts^6,11.

 

THE CONVENTIONAL DEADLIFT

One of the BIG 3 exercises to develop total body strength. It is one of the foundational movements for many sports and exercise activities. Deadlift is a broad term used to describe a large family of exercises. The deadlift is a lower body/multi-joint exercise that focuses on the gluteus maximus, spinal erectors, hamstrings, quadriceps, trapezius, rhomboids, deltoids, hip adductors and finger flexors.  According to Piper et al., there are eleven variations of deadlift¹⁴. Each variation has a specific muscular focus. The conventional deadlift (DL), Romanian deadlift (RDL), stiff legged deadlift (SLDL), single leg deadlift, and sumo deadlift (SDL) are our focus for this discussion.

There are some differences between the DL and SDL starting postures. McGuigan et al. (1996) observed 29 Olympic contestants (19 DL and 10 SDL) discovering the SDL competitors maintained a more upright posture and reduced bar travel compared to the DL competitors. It is accepted maintaining a neutral spine reduces movement and shear force in L4/L5. There is a higher degree of spinal erector activity during the DL⁹. Advocating the importance of establishing proper static and dynamic posture.

EXECUTION

       Starting position

·Standing with feet, flat, shoulder width apart and toes forward or slightly pointed outward.

·         Bar on the floor resting against the shins or within 1 in (3 cm).

Common error: Rounded back

·         Lower down and grasp bar. Feet remain shoulder width apart, and hips should be below shoulders but higher than knees.

·         Weight evenly distribute body weight between mid-foot and heel with a preference for the heel.

·         Shoulders should be over the bar with arms falling vertically in line with the tibia.

·         The grip is pronated or alternated and slightly wider than shoulders.

·         Use a closed grip on the bar.

·         Back should be flat maintaining the natural curvature of the spine.

·         Head remains in line with spine. Not flexed or extended.

·         Elbows fully extended.

Ascension Phase

·         Chest up and out

·         Arms remain straight

·         Lift the bar off the floor by extending the hip and knees simultaneously.

·         Keep the angle between the torso and floor consistent until the bar is above the knee.

·         Maintain a neutral spine position keeping the bar as close to shins as possible.

·         Do not allow the hips to raise faster than nor before the shoulders.

·         Begin to extend trunk once the bar is at the top of knees. Move hips forward to come to a fully erect position. Continue to maintain a neutral spine.

Note: The abdominal cavity should be pressurized until the bar is above the knees before exhaling and breathing normally.

Descending Phase

·         Maintain neutral spinal position.

·         Inhale during descent.

·         Allow the hips and knees to flex allowing hips to travel backward. Avoid increasing curvature of the lumbar spine.

Excessive lumbar extension

·         Return bar to the original starting position.

 Common errors

·         Hyperextension of neck

·         Rounding of shoulders and back

·         Flexing of elbows or pulling with trunk

·         Raising hips faster than the bar

·         Pulling bar against the thigh

·         Excessive lumbar spine extension at completion

Next: The Romanian Deadlift

References

1.      Duba, J. (2007, October). A 6-Step Progression Model for Teaching the Hang Power Clean. National Strength and Conditioning Association, 29, 26-35. Retrieved September 19, 2015

2.       Graham, J. F. (2000). Exercise: Deadlift. Strength and Conditioning Journal, 22, 18-20. Retrieved September 19, 2015

3.       Bigelow, C. (2015). Thoughts on motor control. Phoenix.

4.       Bird, S., & Barrington-Higgs, B. (2010). Exploring the Deadlift. National Strength and Conditioning journal, 32, 46-51. Retrieved September 19, 2015

5.       Chandler, T. J., & Brown, L. E. (2013). Conditioning for Strength and Human Performance (Second ed.). Philadelphia, Pennsylvania, United States of America: Wolters Kluwer Lippincott Williams & Wilkins.

6.       Cook, G. (2010). Movement. Functional Movement Systems: Screening, Assessment and Corrective Strategies . Aptos, California, United States of America: On Target Publications.

7.       Cook, G. (2015, May 29). Squat vs. Deadlift: Which should you choose? Functional Movement Systems . Retrieved June 8, 2015

8.       Escamilla, R. F., & Francisco, A. C. (2002, April). An electromyographic analysis of sumo and conventional style deadlifts. Medicine & Science in Sports & Exercise, 34(4), 682-688. Retrieved September 19, 2015

9.       McGuigan, M. R., & Wilson, B. D. (1996). Biomechanical Anaylsis of the deadlift. Strength and Conditioning Journal, 10(4), 250-255. Retrieved September 20, 2015

10.   NASM. (2014). NASM Essentials of Corrective Exercise Training. Burlinton, Massachutes: Jones & Bartlett.

11.   National Academy of Sports Medicine. (2015). NASM Essentials of Sports Performance Training (First revised ed.). (M. A. Clark, S. C. Lucett, & B. G. Sutton, Eds.) Burlington, Massachusetts, United States of America: Jones and Bartlett Learning.

12.   National Strength and Conditioning Association. (2008). Essentials of Strength Training and Conditioning (Third ed.). (T. R. Baechle, & R. W. Earle, Eds.) Champaign , illinois, United States of America: Human Kinetics.

13.   National Strength and Conditioning Association. (n.d.). Exercise Technique: Deadlift. Retrieved September 19, 2015, from National Strength and Conditioning Association: http://www.nsca.com/Videos/Exercise_Technique/Exercise_Technique__Deadlift/

14.   Piper, T. J. (2001, June). Variations of the Deadlift. National Strength & Conditioning Journal, 66-73. Retrieved September 19, 2015