Standing vs Sitting-cumulative daily muscle activity-Neuromuscular Research 2013

Posted by:  Kevin G. Parker, D.C.

Pub Med.gov:   Neuromuscular Research Center, Department of Biology of Physical Activity, University of Jyväskylä, Jyväskylä, Finland.

PLoS One. 2013;8(1):e52228. doi: 10.1371/journal.pone.0052228. Epub 2013 Jan 18.
Muscle Activity and Inactivity Periods during Normal Daily Life.
Tikkanen O, Haakana P, Pesola AJ, Häkkinen K, Rantalainen T, Havu M, Pullinen T, Finni T.
Source

In conclusion, during normal daily life the locomotor muscles are inactive about 7.5 hours, and only a small fraction of muscle’s maximal voluntary activation capacity is used averaging only 4% of the maximal recruitment of the thigh muscles.

Some daily non-exercise activities such as stair climbing produce much higher muscle activity levels than brisk walking, and replacing sitting by standing can considerably increase cumulative daily muscle activity.
Abstract
Recent findings suggest that not only the lack of physical activity, but also prolonged times of sedentary behaviour where major locomotor muscles are inactive, significantly increase the risk of chronic diseases.

The purpose of this study was to provide details of quadriceps and hamstring muscle inactivity and activity during normal daily life of ordinary people. Eighty-four volunteers (44 females, 40 males, 44.1±17.3 years, 172.3±6.1 cm, 70.1±10.2 kg) were measured during normal daily life using shorts measuring muscle electromyographic (EMG) activity (recording time 11.3±2.0 hours).

EMG was normalized to isometric MVC (EMG(MVC)) during knee flexion and extension, and inactivity threshold of each muscle group was defined as 90% of EMG activity during standing (2.5±1.7% of EMG(MVC)).

During normal daily life the average EMG amplitude was 4.0±2.6% and average activity burst amplitude was 5.8±3.4% of EMG(MVC) (mean duration of 1.4±1.4 s) which is below the EMG level required for walking (5 km/h corresponding to EMG level of about 10% of EMG(MVC)).

Using the proposed individual inactivity threshold, thigh muscles were inactive 67.5±11.9% of the total recording time and the longest inactivity periods lasted for 13.9±7.3 min (2.5-38.3 min).

Women had more activity bursts and spent more time at intensities above 40% EMG(MVC) than men (p<0.05).

Related articles:

Sitting time-9 year all cause mortality in older women-Br J Sports Med. 2012

Stand Up Work Stations and Treadmill Desks

 Stand to sit too long

Your office chair is killing you

Sitting-Is Your Office Chair Killing you? Menshealth 2010

Sitting-The Most Dangerous Thing You’ll Do All Day-Mens Health 2011

Sitting-Can sitting too much kill you? Scientific American Jan 2011

Sitting-Is Sitting a Lethal Activity? The New York Times April 14 2011

Spinal Decompression Case Study (Case Study: 12mm Herniated Disc with Extrusion with Pre- and Post-Spinal Decompression MRI Images) from our office with Before and After MRIs.

Healing Time of Soft Tissue

Back Pain-Insider Secrets revealed-San Fran Gate 2012

A New Gatekeeper for Back Pain

Why Does Back Pain Recur?

Fibroblast cells in Healing

Fish oil-Neurosurgeon for the Pittsburgh Steelers

Foam Roller for Back Pain

Exercise Makes Us Feel Good-NY Times 2011

Gluten Free Diet helped Nerve Pain-Neurology 2010

Inflammation-13 Tips To Fight Inflammation

Laser Therapy in Rehabilitation-Irvine California

Low Back Pain Studies 2010

Magnesium Deficiency

Muscle Trigger points vs Acupuncture points

Neck pain-Journal of the American Board of Family Practice 2004

Nerve ingrowth into chronic painful disc-Lancet 1997

Nerve Supply of the lumbar disc-JBJS 2007

Omega 3’s-Molecular Neurobiology-January 2011

Omega 3′s and Nerve pain-Clinical Journal of Pain 2010

Self Movement Screen

Sitting-Can sitting too much kill you? Scientific American Jan 2011

Vit. D-What We Have Learned About Vitamin D Dosing

If you are suffering from: Sports Injuries, Sprains, Strains, Car accident,  Herniated Disc, Disc Bulge, Degenerative Disc Disease, Neck pain, Headaches, Low back pain, of just want to feel better and have better life performance– please call our office in Irvine, California- at 949.857.1888 or visit our website at ADJUST2IT to learn more about Functional Fitness ChiropracticSports massage,Myofascial ReleaseCorrective ExerciseNon Surgical Spinal DecompressionClass IV laser,  and Functional Nutrition.

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s


%d bloggers like this: