How Repeated Stretches Affect Muscle Viscoelasticity

How Repeated Stretches Affect Muscle Viscoelasticity

Dr. GJohn Mullen Biomechanics, Blog, Dr. John Mullen, Latest&Greatest, Training Leave a Comment

Viscoelasticity is the ability to return of a material to return to a position after an extended force application. Dynamic tissues (muscles, tendons, ligaments) possess viscoelastic structures. The ideal mechanism and benefits of stretching are uncertain, but previous work suggests constant-torque is more beneficial than constant-angle for improving muscle creep, resulting in a decrease in stiffness. This creep is the …

Kinematics of the Thoracic Spine in Trunk Rotation

Kinematics of the Thoracic Spine in Trunk Rotation

Dr. GJohn Mullen Biomechanics, Blog, Dr. John Mullen, Latest&Greatest, Training 1 Comment

Thoracic spine rotation is used in long-axis swimming. Therefore, understanding the biomechanical demand of this motion is mandatory to understand the optimal hydrodynamics. Unfortunately, the thoracic spine is rarely researched due to the low volume of injuries at this region. Simply comparing the thoracic spine to other areas is unjust, as the thoracic spine has many differences from the rest …

Motor Learning for Swimmers: Part I

Motor Learning for Swimmers: Part I

Dr. GJohn Mullen Biomechanics, Blog, Latest&Greatest Leave a Comment

Take Home Points on Motor Learning for Swimmers: Part I Learn the motor learning terminology for the best swimming practice. Motor learning for swimmers is an expanding form of training. This is most popularized by Dr. Rushall’s work and his Swimming Science Bulletin: SWIMMING ENERGY TRAINING IN THE 21ST CENTURY: THE JUSTIFICATION FOR RADICAL CHANGES. If you have not read this document, …

Friday Interview: Stefan Szczepan Ph.D. Discusses Immediate Feedback in Swimmers

Friday Interview: Stefan Szczepan Ph.D. Discusses Immediate Feedback in Swimmers

Dr. GJohn Mullen Biomechanics, Blog, Latest&Greatest, Training 1 Comment

1. Please introduce yourself to the readers (how you started in the profession, education, credentials, experience, etc.). Hi, my name is Stefan Szczepan. I’m a scientist at the University School of Physical Education in Wroclaw, Poland and I work at the Department of Swimming. This year I received a doctoral degree. I’m interested in motor control and learning included motor …

Effects of Barbell Deadlift Training on Submaximal Motor Unit Recruitment for the Quadriceps

Effects of Barbell Deadlift Training on Submaximal Motor Unit Recruitment for the Quadriceps

Dr. GJohn Mullen Biomechanics, Blog, Competition, Dryland, Training 4 Comments

Background on the Barbell Deadlift Dryland Training has become a quintessential aspect of swimming. Not only does dryland provide the opportunity for athletes to become stronger but it also provides an avenue for the body to create improved physiological adaptations resulting in more functional strength and faster times in the water.   The barbell deadlift is an exercise that requires …

Rotational Power Test

Rotational Power Test

Dr. GJohn Mullen Biomechanics, Blog, Competition, Training 1 Comment

Core muscular endurance is a variable associated with low back pain rehabilitation. Core training is believed to improve ground sports performance but has not been confirmed in swimming. Rotational power is deemed an important variable in rotational power athletes. The correlation between rotational power and swimming success has yet to be proven, but many dry-land programs strive for improved rotational …

VO2 Kinetics on Heavy Swimming

VO2 Kinetics on Heavy Swimming

Dr. GJohn Mullen Biomechanics, Blog, Competition, Training Leave a Comment

The intensity of exercise prescribed during a workout is typically defined based on the pulmonary oxygen uptake and blood lactate response to constant work. This is easily researched in running and cycling but is difficult in swimming. Therefore, many coaches prescribe intensity based on experience. A slow component of the VO2 kinetics is superimposed upon the rapid response, resulting in …

Athletic Training Effects on Spinal Curvature

Athletic Training Effects on Spinal Curvature

Dr. GJohn Mullen Biomechanics, Blog, Injuries, Training Leave a Comment

Background on Spinal Curvature The excessive spinal curvature is common in the sport of swimming. This frequency is difficult to interpret as many health care professionals have recommended swimming as a sport for rehabilitation, yet many others have linked swimming as a cause of this excess curvature. Spinal curvature in the adolescent spine typically involves curves in the sagittal plane …

Is HIT (High Intensity Training) useful for swimmers? Part 2

Is HIT (High Intensity Training) useful for swimmers? Part 2

Dr. GJohn Mullen Biomechanics, Blog, Dryland, Training 2 Comments

The physiology behind High-Intensity Training (HIT) The scientific evidence in support of high-intensity training has increased the number and quality of studies, especially those involving high-level athletes. It’s already known that a large number of swimmers, all over the world, are applying the basic principles of this scientific methodology using a large number of different strategies (including ultra-short race-pace training (USRPT) and …