Lars Thurfjell
Free trial →
37.37° N 122.04° W SUNNYVALE / CA
Personal training · Sunnyvale & online

Built
stronger. stronger. steadier. faster. leaner.

Programs that actually fit the week you actually have. Eight in-person sessions, online programming, or a single tune-up. Every plan starts with your numbers, not a sales pitch.

Strength & conditioning Fat loss without the misery NASM-CPT certified Marathon-trained In-person Sunnyvale Online programming worldwide Strength & conditioning Fat loss without the misery NASM-CPT certified Marathon-trained In-person Sunnyvale Online programming worldwide

Run your numbers.

Free calculators, no email required. Use them to gut-check your own programming, or send your results when you reach out and we'll skip the small talk.

What you walk out with.

Not abs by summer. Not "best version of yourself." Specific things you can put on your calendar.

/ Body

A program that fits your schedule, not the other way around.

Three sessions a week, written around your actual calendar: work, kids, soccer practice, the whole thing. Updated every two weeks based on what's working.

/ Numbers

Real metrics, not vibes or scale weight.

Strength, body composition, resting HR, weekly mileage if you run. Tracked in a spreadsheet you keep. You'll know exactly what's moving.

/ Habits

Skills, not willpower.

Cooking, sleep, recovery, training in a noisy gym. The boring stuff that decides whether the program actually works after I'm gone.

The process

How it actually works.

Three steps from "interested" to lifting heavy things on Tuesday.

/ 01

Free trial session.

45 minutes. We talk through what you've tried, what hurts, what you actually want. No pitch. If it's not a fit you'll know inside the hour.

/ 02

Programming built around you.

I write your first eight weeks based on the numbers from your trial and the calculators above. Then we adjust every two weeks.

/ 03

Train, review, repeat.

In-person at the gym, or programming you run on your own with a weekly check-in. Either way, you leave with skills that outlast the package.

The trainer

Lars Thurfjell.

NASM-certified, ten years lifting, ran the 2025 SF marathon in 3:42. Trained out of small Bay Area gyms before going independent.

The short version: I write programs I'd actually do myself and keep working with people until they don't need me. That's the whole pitch.

NASM-CPT Precision Nutrition L1 CrossFit L1 CPR / AED

Three ways to train.

/ Sample

Free trial

$0/45 min
  • One in-person session, no commitment
  • Movement screen + goal call
  • You leave with a 1-week starter plan
Book it
/ Remote

Online coaching

$420/month
  • Custom programming you run on your own
  • Weekly video review
  • App with logging + form videos
  • Best for traveling / out-of-state
Apply
Reach out

Let's see if we're a fit.

Trial sessions are free and run about 45 minutes. I'll get back to you within a day.