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Archive for the ‘Kinesiology’ Category

Frozen Ring Finger Explained

Unlike your other fingers there’s more tendon sharing and muscle motor unit mixing between the ring and middle finger digitations of the profundus than the superficialis.  That is why when you bend your middle finger sufficiently and hold it in place (can be done with one hand) the ring finger cannot move. It’s also known as the “paralyzed finger” effect.  The tendon for your ring finger is connected to your middle finger. With the middle tendon stretched (bent) to its length, the ring finger tendon being tethered to it will not be able to lift upwards.

Hope this helps explain it ~~~

http://en.wikipedia.org/wiki/Flexor_digitorum_profundus_muscle

 

 

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Principles of Fitness

“If you were there once … you’ll get there quicker the next time.”

If you are experiencing a plateau or feel you’ve hit a wall with your training program you might want to think about a few things, the Principles of Fitness.

1)  Principle of Progressive Overload:  The operative word here is “progressive.”  In order to force your body to respond and adapt to a stimulus, activity or workout, you must gradually overload the body.  Rome wasn’t built in a day and your body is the same.  You should focus on the exercises you do, your form, your reps (count), the weight you use, and your speed (faster/slower).  Since I know that you are serious about your training goals, you are keeping a daily log of your workouts.  Refer to what you did last time and change it up!

2)  Principle of Specificity:  Quite simply stated, you get good at what you practice.  Have you heard of the SAID Principle?  SAID is an acronym for, Specific Adaptation to Imposed Demand.  The human body will make specific adaptations based on current activity or stressors in order to make that task easier to handle in the future.  Simply put, the more you do something, the better you will perform at that task.

3)  Principle of individual Variation (Individualization):   Individuals will respond differently to the same stimulus.  This is because we are all different;  age, genetics, lifestyle, nutrition, training age, sleep, gender, hormones, disease, medications.  We are all a bit different, however, everyone responds to exercise.  Adding variety to your exercises will ensure you will continually develop and adapt.  This means you will continue to make gains.  So, change things up every once in awhile in order to continue progression.

4)  FITT Principle:  These are what you should consider when planning and implementing your training program; Frequency, Intensity, Time and Type.

Frequency is how often.  Intensity is how difficult based on your individual ability.  Time is the duration.  And Type is the mode of exercise, or your goal.  Some people prefer to add “E” (FITTE) with E representing enjoyment also.

5)  Principle of Priority:  Before you start, prioritize what is important to you.

https://www.youtube.com/watch?v=si4Ynm8ff5Y

Scope of Practice: 5 Components of Fitness

A personal trainer’s scope of practice:  To enhance the components of fitness for the general healthy population.

1) Cardiovascular Endurance (cardiorespiratory):  the ability of the heart and lungs to provide oxygen to the body.

2) Muscular Strength:  the ability of a muscle to contract one time (1 rep max).

3) Muscular Endurance:  the ability of a muscle to contract repeatedly.

4) Flexibility:  the range of motion at a joint

5) Body Composition:  fat free mass -vs- fat mass as measured by calipers, hydrostatic weighing, DEXA X-ray imaging, Bioelectrical Impedance, and BOD POD.

 

Muscles, Movements & Actions

“Everyone is happy to do Snow Angels, but not as much about doing jumping jacks, when they’re virtually the same thing.” ~ Tim H. NPTI Instructor

A joint is where 2 bones meet.  Flexibility is determined by a joint’s range of motion.  During muscle flexion, the angle of the joint decreases as demonstrated in a bend or curling motion.  During extension of a muscle, the angle of the joint is increased as demonstrated during a sitting to standing motion.

You may have also heard of abduction and adduction.  An abduction movement is considered to be a movement away from the body’s midline or center (raising your arm to the side and up to your shoulder height).  An adduction movement is a movement toward the midline of the body (clicking your heals together).  There is also horizontal abduction and adduction.  This is simply the same movement within the transverse plane, perpendicular to those just described.  Horizontal movements are demonstrated when we do a chest press, push up, chest fly, or while we are hugging a tree (parallel to the horizon).

An isolation exercise is classified as a movement using only one joint.  A compound exercise is classified as movements utilizing more than one joint.

Gym Movements:

chest press:  (compound) horizontal shoulder adduction in the transverse plane, elbow extension

leg press:  (compound) hip and knee extension

V-grip cable row:  (compound) shoulder extension, elbow flexion

triceps pushdown:  (isolation) elbow extension

biceps curl:  (isolation) elbow flexion

dip:  (compound) shoulder flexion, elbow extension

Types of Muscles & Contractions

There are 3 types of muscle; smooth, cardiac and skeletal.  Both smooth and cardiac are considered involuntary, which means that continue to work whether we are conscious or not, otherwise falling asleep would be a lot less appealing!  (paraphrasing Tim H.)  Skeletal fibers have two types of fibers; Type I, slow twitch and O2 rich blood, and Type II, fast twitch, white, powerful and big.

There are 3 types of muscle contractions; concentric, eccentric and isometric.

Concentric contractions go against gravity or against resistance (muscle force > resistance).  The muscles get shorter during concentric movement and this is also considered the “working part” of any movement.  In the gym, the concentric contraction is the part where you exhale.

Eccentric contractions are the “easy” part of movement (muscle force < resistance).  During eccentric movements the muscle lengthens.  In the gym, you inhale during eccentric movements and it is called the “negative”.

Isometric contractions offer little to no movement at all (muscle force = resistance).  In the gym you will hold an isometric contraction about 15 seconds to 30 seconds, but almost always less than 2 minutes.

Are You Exercising or Training?

The objective of your effort was the premise of Mr. Rippetoe’s article, “Rippetoe Throws Down.”  Perhaps more specifically Rippetoe wrote to induce or justify that increasing strength should be yours and everyone else’s objective, or you’re just sweating and getting tired without purpose.  I would suspect that most of Mr. Rippetoe’s articles take this “get strong or go home” perspective, just a guess of course.  I certainly agree with his stance on strength training.  However, Rippetoe clearly minimizes other physical traits important to life and specifically sports performance like technique, balance, speed, and endurance.  And, “exercise” as described by Rippetoe does go against his claim and produces the long-term benefit of health.

Rippetoe, Mark. “T NATION | Rippetoe Throws Down.” T NATION | The Intelligent and Relentless Pursuit of Muscle. N.p., 15 Apr. 2013. Web. 28 Apr. 2013. < http://www.t-nation.com/free_online_article/most_recent/rippetoe_throws_down>.

A Resource for Muscles & Their Actions

I found exrx.net to be a good collection of exercise related information with a seemingly limitless number of muscle-associated exercises listed.  I had a muscle in mind and it was the first muscle I searched for, the Iliocostalis.  I wasn’t able to locate it initially.  After clicking around, I found it under “waist exercises”.  On the waist exercises page I was able to click the section title “Erector Spinae” and then land on the page detailing the anatomy and description of the three main erector muscles, which included the Iliocostalis.  And another curiosity to mention was that exrx.net had the Pectoralis Minor listed as a synergist to the Pectoralis Major and the Pectoralis Major as a shoulder extension, adduction and abduction muscle.

“Weight Training, Exercise Instruction & Kinesiology.” ExRx (Exercise Prescription) on the Internet. N.p., n.d. Web. 28 Apr. 2013.  http://www.exrx.net/Exercise.html.

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