At age 30, he transformed his fitness routine. It helped him launch his dream career in real estate.

Dustin Chaveleh transformed his fitness with a combination of shorter, simpler workouts, more full-body exercises, and smart dieting.

Carolyn Fong for BI For his 30th birthday, Dustin Chaveleh wanted to get in the best shape of his life.

Late last year, the San Francisco resident was newly single and looking for a change.

He had been spending long hours at a desk, building his career in tech roles at companies like Bloomberg and Goldman Sachs.

His real dream job, though, was real estate, so his spare hours went to the extensive coursework for a residential sales license.

The hustle left him in a vicious cycle, struggling to stick to a healthy routine .

He couldn't find the energy to hit the gym after work, but the less he went, the more he felt lethargic, unmotivated, and unhappy.

"I didn't want to just sit in a rut," he told Business Insider.

"I had lost sight of the gym, and I felt like I didn't know where to start." In the autumn of 2025, he started working with a remote personal trainer from Enaz Fitness, hoping that by his birthday in late May, he could look and feel like a new man.

This is part of Business Insider's new longevity series, The Long-Term Investment, where we profile ambitious people who've mastered smart habits to live long lives.

See more: She's 80 with the fitness level of a 60-year-old.

Her routine is surprisingly simple.

Within a few months, Chaveleh said he was lifting heavier, feeling more energized, and liking what he saw in the mirror.

Then a bigger change began to take shape: the networking connections from his new fitness routine helped Chaveleh kick-start his real estate career.