Build a stronger
body you're proud of

Personalized one-on-one strength training, corrective exercise + nutrition programming

Marina Del Rey, CA

Build a
stronger
body you're proud of

Personalized one-on-one strength training, corrective exercise + nutrition programming

Marina Del Rey, CA

Byron and Whitney Paidoussi, owners of Fitness and Fuel personal training studio in Marina Del Rey.

Be guided by experts, not guesswork

This isn’t a crowded gym or a one-size-fits-all program. Established in 2004, Fitness + Fuel is a focused, high-touch personal training experience designed for people who want results they can see + feel. From our private studio on the border of Marina del Rey + Venice, expert coaches Byron + Whitney use science-based training, corrective exercise + customized nutrition to help you build a stronger, leaner, pain-free body with clarity + confidence.

You’ll be challenged, guided + supported every step of the way…
because YOU + your body deserve a smarter approach.

  • A woman doing a shoulder press exercise with a trainer assisting her, in a gym with fitness equipment and weights visible in the background.

    Personal Training

    One-on-One Coaching. Train privately with experienced, expert coaches who design every session around your body, goals + activity +/or injury history. This is precision-based strength training focused on improving body composition by building lean muscle + reducing unwanted bodyfat, delivering measurable, lasting results.

  • A man lying on a workout bench lifting dumbbells in a gym with fitness equipment and a mirror.

    Long Term Results

    Sustainable Results. This isn’t quick-fix fitness—it’s intelligent coaching built for longevity. We focus on building strength, knowledge, confidence + healthy lifestyle habits that support your life today + years from now.

  • A woman performing a step-up exercise with a weighted vest in a gym, watched by a trainer kneeling beside her. The gym has a neon sign that reads 'Fitness + Fuel' on the wall.

    Pain-Free Movement

    Corrective Exercise + Pain Relief. If discomfort, injuries, or postural issues are holding you back, this is where positive change begins. Our science-based approach identifies the root cause of pain + retrains your body to move efficiently, confidently + without limitation.

  • A fit woman with toned muscles posing with hands on hips, wearing a blue sports bra and black leggings against a gray background.

    Nutrition Coaching

    Precision Nutrition. Go beyond generic meal plans with daily macro guidance + nutrition support tailored to your body + lifestyle. We analyze your current habits, remove the guesswork + build sustainable programs that support fat loss, lean muscle gain, performance + long-term health.

  • A young man sitting in Fitness and Fuel in Marina Del Rey, smiling and making a heart shape with his hands. He's wearing a black tank top and black shorts.

    New Client Experience

    Start Now! Your journey begins with a private, comprehensive assessment of your strength, mobility, posture, muscular imbalances, body composition + current diet. You’ll leave with clarity, a personalized training + nutrition roadmap + a plan for results you can maintain.

Book Now

  • <autoplay speed=5></autoplay>Lillie

    “Since training with Whitney, I’ve lost 6.8% body fat, gained 11 lbs of lean muscle, and completely eliminated the knee strain + low back pain I had before starting. She created a personalized plan that corrected imbalances I didn’t even know I had. I felt absolutely stunning for my wedding + beyond—strong, confident + energized.”

  • Billy

    “I’ve trained with countless strength + conditioning coaches through collegiate hockey, and Byron is one of the best I’ve worked with. The level of expertise he brings—teaching how movements affect balance, mobility + strength—is unmatched. I’ve dropped 17 lbs of body fat, added 10lbs lean muscle + still learn something new every session.”

  • Jason

    “Whitney built a custom program completely specific to the reality of my body + lifestyle. The small tweaks to technique, those ½-inch adjustments made all the difference. My body fat dropped nearly 10%, I gained meaningful muscle, corrected years of bad posture + finally feel confident aging strong.”

  • Arielle

    “Whitney diagnosed muscular imbalances that were causing pain and designed a routine that truly transformed my life. Over 7 months, I lost 30 lbs of fat, gained 10 lbs of muscle, eliminated years of lower back pain + completely changed my relationship with my body. I would absolutely still be working with her if I hadn’t moved.”

  • Chris

    “Byron + Whitney have built one of the best personal training studios in Los Angeles. The attention to detail, custom programming, + focus on form made this one of the best investments in my health I’ve ever made. I gained muscle, lost fat + have truly never felt more confident in my body.”

  • Sarah

    “I had years of training experience, but the difference here was the precision + depth of knowledge. They perfected my form in ways I was never taught before, helped prevent injuries, + guided both training + nutrition. They truly know what they’re doing + it shows in the results.”

  • Hamza

    “In under 3 months, I put on 9 lbs of lean muscle with workouts + diet tailor-made specifically for me. This is the first time I’ve ever seen results like this. It’s one-on-one training with coaches who are genuinely invested in your success.”

  • Grant

    “You could go to a big-box gym and get someone fresh off a certification—or you could work with Whitney + Byron, two professionals at the top of their game. Their nutrition counseling + progressive workouts deliver undeniable results that go far beyond appearance. They are completely invested in helping you succeed.”

Modern building with large glass windows and doors, location number 13338, with potted agave plants and a row of smaller plants along the sidewalk.

Conveniently Located. Thoughtfully Designed.

  • Located on the border of Venice, Marina Del Rey, Culver City, Mar Vista and Playa Del Ray, and close to Santa Monica and West LA.

  • Free, secure, covered parking reserved just for you. You’ll never circle the block looking for parking!

  • Private showers with provided towel service. Get in, get out, get on with your day.

Buy 3 months + get 3 FREE sessions

Ready for results you can see + maintain? Commit to 3 months of expert-led training + nutrition programming + we’ll give you 3 FREE bonus sessions to keep your momentum high, form dialed in + progress measurable!