Bloated and clumsy sentences? Which last forever? They make the reader stop reading at all.
Do you know what's causing this swell? Overdoing it with hard words. Multi-word. Lazy editing.
And do you know how to cure this bloating? Write something that's easy to read: Cut long sentences in half. Remove unnecessary words like "really," "a lot" and "actually." Edit mercilessly. Break the rules learned at school and start sentences with "I," "Or," "But" and "A." Use many sentences in one word. Replace long words with short ones. Feel the rhythm of the syllables and the sounds. Speak it out loud.
Remember that the sole purpose of the sentence is to get your reader to read the next sentence.