Napięcie mięśniowe jest wysokie w okolicy odcinka lędźwiowego.

In Polish, the most natural order here is noun + adjective, so:

• napięcie = tension
• mięśniowe = muscular / muscle-related

So napięcie mięśniowe means muscle tension or muscular tension.

The order mięśni napięcie would sound unnatural in normal modern Polish. Polish usually puts descriptive adjectives after or before the noun depending on style, but with this kind of medical/technical phrase, napięcie mięśniowe is the standard expression.

Mięśniowe is an adjective formed from mięsień (muscle).

• mięsień = muscle
• mięśniowy / mięśniowa / mięśniowe = muscular, relating to muscles

Here it appears as mięśniowe because it has to match napięcie, which is:

• neuter
• singular
• nominative

So the adjective must also be neuter singular nominative: mięśniowe.

Because wysokie has to agree with napięcie.

Napięcie is:

• neuter
• singular

So the adjective must also be neuter singular:

• wysoki = masculine
• wysoka = feminine
• wysokie = neuter

That is why the sentence says:

• Napięcie mięśniowe jest wysokie.

Even though in English we say high tension, in Polish the adjective still has to match the grammatical gender of the noun.

Napięcie is neuter.

A very common clue is the ending -e in the dictionary form, especially for nouns like this one. Another clue is that many neuter nouns take adjective forms like:

• dobre napięcie
• wysokie napięcie
• małe napięcie

So in this sentence:

• napięcie = neuter singular subject
• therefore mięśniowe and wysokie are also neuter singular

Yes, Polish often omits jest (is) in informal speech, especially in the present tense. So you may hear:

• Napięcie mięśniowe wysokie...

But that sounds more elliptical, note-like, or conversational.

In a full standard sentence, especially in medical or formal language, jest is natural and correct:

• Napięcie mięśniowe jest wysokie...

So:

• with jest = full, standard sentence
• without jest = possible in some contexts, but less neutral

W okolicy means in the area of, around, or in the region of.

The base noun is:

• okolica = area, region, vicinity

After w, when you mean location, Polish usually uses the locative:

• w okolicy = in the area / in the vicinity

So:

• w okolicy odcinka lędźwiowego = in the area of the lumbar section

This is a common medical/anatomical way to describe approximate location rather than a precise point.

Because okolica requires the genitive when you say the area of something.

So:

• odcinek lędźwiowy = the lumbar section/segment (nominative)
• okolica odcinka lędźwiowego = the area of the lumbar section (genitive)

Forms:

• odcinek → odcinka
• lędźwiowy → lędźwiowego

This is very common in Polish:

• okolica brzucha = abdominal area / area of the abdomen
• okolica szyi = neck area
• okolica odcinka lędźwiowego = area of the lumbar section

Literally, it means lumbar section or lumbar segment.

• odcinek = section, segment
• lędźwiowy = lumbar

In medical Polish, odcinek lędźwiowy usually refers to the lumbar part of the spine. Depending on context, English translations might be:

• lumbar region
• lumbar spine
• lumbar section of the spine

So the Polish is slightly more anatomical/technical than simply saying lower back.

Yes, you could, but it means something slightly different.

Compare:

• w okolicy odcinka lędźwiowego = in the area of the lumbar section / around the lumbar region
• w odcinku lędźwiowym = in the lumbar section

The first one sounds a bit less exact and more like around that region.
The second sounds more directly anatomical, as if locating something in that section itself.

In medical descriptions, both can be possible depending on what exactly you want to say.

Wysokie is correct and understandable, but in medical Polish you may also see:

• wzmożone napięcie mięśniowe = increased muscle tension
• podwyższone napięcie mięśniowe = elevated muscle tension

These can sound more professional or clinical than wysokie.

So:

• jest wysokie = is high
• jest wzmożone = is increased
• jest podwyższone = is elevated

All are possible, but the best choice depends on tone:

• wysokie = straightforward
• wzmożone / podwyższone = more medical

Here is the full breakdown:

• Napięcie — nominative singular
• mięśniowe — nominative singular neuter (agrees with napięcie)
• jest — verb, 3rd person singular, present tense
• wysokie — nominative singular neuter (predicate adjective agreeing with napięcie)
• w — preposition
• okolicy — locative singular after w
• odcinka — genitive singular
• lędźwiowego — genitive singular masculine (agrees with odcinka)

So the structure is basically:

• subject: Napięcie mięśniowe
• verb: jest
• description: wysokie
• location phrase: w okolicy odcinka lędźwiowego

Yes, it is a tricky word for learners.

A rough guide:

• lę sounds somewhat like len, but with a nasal vowel
• dźw is a soft jv / dzhv-like cluster
• io is pronounced separately
• wego sounds like vye-go

A rough English-friendly approximation might be:

• len-jvee-VE-go

But that is only approximate.

A few important sounds:

• ł = like English w
• ź / dź = soft sounds, somewhat like a very soft j
• ę is nasal, though before some consonants it may sound closer to en/em

If you want, the word can be broken into chunks:

• lędź-wio-we-go

That often makes it easier to practice.

Yes. Polish word order is more flexible than English, but not every order sounds equally natural.

The neutral order here is:

• Napięcie mięśniowe jest wysokie w okolicy odcinka lędźwiowego.

You could also say:

• W okolicy odcinka lędźwiowego napięcie mięśniowe jest wysokie.

This puts more focus on the location first.

But some rearrangements may sound marked or awkward unless you want special emphasis. For a learner, it is best to keep the original order unless you have a reason to emphasize a certain part.

Yes, it sounds fairly formal and medical/anatomical.

Features that make it sound that way:

• napięcie mięśniowe instead of a simpler phrase
• odcinek lędźwiowy instead of everyday dolna część pleców (lower back)
• w okolicy instead of a more casual wording

A more everyday version might be something like:

• Mięśnie są bardzo napięte w dolnej części pleców.

That would feel less technical and more conversational.

The original sentence is the kind of phrasing you might see in:

• a physiotherapy note
• a medical report
• a posture or movement assessment