המגבלה הגופנית משנה את היציבה שלי.

Because the noun is definite, and the adjective has to match it.

In Hebrew, adjectives usually come after the noun and agree with it in:

• gender
• number
• definiteness

So:

• מגבלה = a limitation
• המגבלה = the limitation
• גופנית = physical / bodily
• הגופנית = the physical

That is why Hebrew says המגבלה הגופנית for the physical limitation.

Because מגבלה is a feminine singular noun, and the adjective has to agree with it.

The adjective here is:

• masculine singular: גופני
• feminine singular: גופנית

So:

• מגבלה גופנית = a physical limitation
• קושי גופני = a physical difficulty

A very common thing to watch in Hebrew is that adjectives change form to match the noun they describe.

The ending ־ה is a strong clue that a noun is feminine, and מגבלה is indeed feminine.

That is why the sentence uses:

• הגופנית and not הגופני
• a feminine-singular present form of the verb, even though in unpointed spelling it looks the same as the masculine form

So yes, the noun’s gender controls the rest of the sentence.

משנה is the present tense form of the verb לשנות, meaning to change.

Here it means changes / is changing.

A useful point: in modern Hebrew, the present tense can often mean either:

• a general fact: changes
• something happening now: is changing

So המגבלה הגופנית משנה את היציבה שלי can naturally mean either:

• The physical limitation changes my posture
• The physical limitation is changing my posture

depending on context.

It actually is feminine singular here, but in unpointed Hebrew the masculine and feminine singular forms of some present-tense verbs can be spelled the same.

With לשנות in the present tense:

• masculine singular: משנה
• feminine singular: משנה

They are written the same without vowel marks, so you identify the gender from the subject:

• המגבלה is feminine
• therefore משנה is understood as feminine singular here

This is very normal in Hebrew.

את marks a definite direct object.

Here, the thing being changed is היציבה שלי = my posture, so Hebrew puts את before it:

• משנה את היציבה שלי

Important: את usually does not have its own English translation. It is a grammar marker.

Compare:

• אני קורא ספר = I am reading a book
• אני קורא את הספר = I am reading the book

So in your sentence, את tells you that היציבה שלי is the direct object of משנה.

In modern Hebrew, a very common way to say possession is:

ה־ + noun + שלי / שלך / שלו etc.

So:

• הספר שלי = my book
• הבית שלי = my house
• היציבה שלי = my posture

This is the normal everyday pattern.

Also, a possessed noun is definite in meaning, so it makes sense that the object is marked with את.

Yes, יציבתי is possible, and it means my posture too.

But the difference is mainly in style:

• היציבה שלי = the common modern everyday way
• יציבתי = more formal, literary, or elevated

So the sentence could theoretically be phrased with יציבתי, but היציבה שלי sounds more natural in ordinary modern speech.

The sentence uses a very common Hebrew word order:

subject + verb + direct object

So:

• המגבלה הגופנית = subject
• משנה = verb
• את היציבה שלי = direct object

This is straightforward and neutral.

Hebrew word order can be flexible for emphasis, but this version is the standard, unmarked way to say it.

Often yes, but the feel can be slightly closer to bodily or of the body, depending on context.

So מגבלה גופנית is commonly understood as:

• physical limitation
• bodily limitation

In many contexts, English would simply translate it as physical. The exact nuance depends on the situation, but grammatically there is nothing unusual here.

שלי means of me / mine, and in this kind of phrase it means my.

So:

• היציבה = the posture
• היציבה שלי = my posture

This is one of the most useful Hebrew patterns to learn:

• שלי = my / mine
• שלך = your / yours
• שלו = his
• שלה = her

So if you recognize noun + שלי, you can usually read it as my + noun in English.