שיווי המשקל משתפר עם תרגיל חיזוק.

Literally, שיווי המשקל is something like the equalizing of weight or equilibrium. In everyday modern Hebrew, it means balance.

It is a two-word expression because it is a construct phrase:

• שיווי = balancing / equalization
• המשקל = the weight

Together, they form a fixed expression meaning balance.

This is because שיווי המשקל is a construct chain (smikhut).

In Hebrew construct phrases:

• the first noun usually does not take ה־
• the second noun can take ה־, and that makes the whole phrase definite

So:

• שיווי משקל = balance / equilibrium in a general sense
• שיווי המשקל = the balance / equilibrium

This is very common in Hebrew.

Because the subject שיווי המשקל is masculine singular.

Even though the phrase has two words, the whole subject is treated grammatically as a singular noun phrase, and its head noun is שיווי, which is masculine. So the verb agrees with it:

• שיווי המשקל משתפר = balance improves

If the subject were feminine singular, you would expect משתפרת.

משתפר means improves or is improving.

It comes from the root ש-פ-ר, related to improvement or becoming better.
This form is in hitpa'el: להשתפר = to improve / to get better

So:

• המצב משתפר = the situation is improving
• שיווי המשקל משתפר = balance improves / is improving

It usually describes a change happening to the subject itself, not something the subject improves directly.

These two forms are related but not the same:

• משתפר = improves / gets better
• משפר = improves something / makes something better

So:

• שיווי המשקל משתפר = balance improves
• התרגיל משפר את שיווי המשקל = the exercise improves balance

In your sentence, the subject is balance, so Hebrew uses משתפר.

Yes, עם literally means with, but in this sentence it can be understood more naturally in English as with, through, or by means of, depending on context.

So:

• שיווי המשקל משתפר עם תרגיל חיזוק
  can mean
• Balance improves with strengthening exercise
• Balance improves through a strengthening exercise
• Balance improves by doing a strengthening exercise

Hebrew עם is often broader than a very literal English with.

Both are possible, but they mean slightly different things.

• תרגיל חיזוק = a strengthening exercise
  This is a compact noun+noun expression, like strengthening exercise.

• תרגיל לחיזוק = an exercise for strengthening
  This sounds a bit more explicit about purpose.

In your sentence, תרגיל חיזוק is natural and concise.

Because the sentence is talking about a strengthening exercise in a general sense, not the specific strengthening exercise.

So:

• עם תרגיל חיזוק = with a strengthening exercise / with strengthening exercise
• עם תרגיל החיזוק = with the strengthening exercise

Without ה־, it is indefinite and more general.

שיווי is usually pronounced approximately shi-VEE.

It may look unusual because it comes from a more formal noun pattern related to roots meaning equality or balancing. In unpointed Hebrew, spellings like this can seem odd at first.

The whole phrase is pronounced roughly:

shi-VEE ha-mish-KAL mish-ta-PER im tar-GIL khi-ZUKH

A few pronunciation notes:

• שיווי = shi-VEE
• המשקל = ha-mish-KAL
• משתפר = mish-ta-PER
• חיזוק = the ח is a throaty sound, not an English h

Yes. משתפר is present tense.

Hebrew present tense can often translate into English in more than one way depending on context:

• Balance improves
• Balance is improving
• The balance improves

Hebrew present tense is less tightly tied to one exact English tense than learners sometimes expect.

Yes, absolutely. That version is very natural too.

Compare:

• שיווי המשקל משתפר עם תרגיל חיזוק
  = Balance improves with a strengthening exercise.

• תרגיל חיזוק משפר את שיווי המשקל
  = A strengthening exercise improves balance.

The difference is in focus:

• the original sentence focuses on balance
• the second version focuses on the exercise

Both are correct, but the structure changes:

• משתפר = improves / gets better
• משפר את... = improves something

It is very common and completely standard. You will hear it in:

• medical contexts
• fitness and physical therapy
• school science
• everyday conversation

For example:

• יש לו בעיות בשיווי המשקל = he has balance problems
• היא איבדה את שיווי המשקל = she lost her balance

So even though the form looks a little formal, it is a normal everyday expression.