Meet the Runner, Coach, and Candy Connoisseur Behind the 2025 Boston MarathonⓇ Series
iFIT Trainer Casey Field Gilbert is a NASM-certified personal trainer, former Division I track and field hurdler, and lifelong athlete with a passion for helping others chase their goals. From coaching marathon workouts across the globe to perfecting his post-run steak recipe, Casey brings energy, experience, and humor to every run.
Now, Casey is gearing up to lead the 2025 Boston MarathonⓇ Presented by Bank of America on iFIT, a flexible, on-location experience that lets members choose how they want to conquer the iconic race. Whether you’re following Casey’s expert coaching or running solo, you’ll feel the rhythm of Boston with every step.
Coming Soon: 2025 Boston MarathonⓇ Series
This year, Casey returns to the course for a brand-new series filmed on location. This flexible program offers two unique ways to run Boston, both programmed at a steady 10:30 min/mi pace:
Trainer-Guided with Casey
Let Casey coach you through the entire route in a format that fits your training needs:
- 8 Guided 5Ks
- 4 Guided 10Ks
- 2 Guided Half Marathons
Get pacing tips, motivation, and real-time coaching so you can train smarter and feel race-day ready.
Solo POV Experience
Prefer to run without instruction? Go trainer-free and immerse yourself in the Boston course. The POV experience also has three formats to choose from, letting you run Boston your way.
- 8 Guided 5Ks
- 4 Guided 10Ks
- 2 Guided Half Marathons
Marathon Wisdom from a Marathon Coach
Casey ran and coached the 2021 Virgin Money London Marathon® a first for him and a major milestone in his iFIT journey. It was five times longer than any on-camera workout he’d filmed before and packed with emotion.
“I was nervous, excited, and incredibly grateful,” he recalls. “It’s hard for an American to get into that race, so coaching it while running was unforgettable. Watching members complete it later through the app made me emotional all over again.”
“Easy miles! About 70–80% of your training should be at an aerobic pace. It’s not about pushing hard every day. Give your body 3–4 months and spend most of that time running easy, consistent miles.”
Casey’s Top Advice for New Marathoners
Behind the Scenes in Uzbekistan
One of Casey’s most memorable series was filmed in Uzbekistan, where a steep fortress climb turned into an impromptu race with a local youth soccer team.
“We were filming at the Fortress of Alexander the Great when about ten kids started running with me to the top. We high-fived at the summit and snapped a photo together. It was unforgettable.”
Off the Track: Candy, Golf, and “Cheat Meals”
Yes, Casey has a serious sweet tooth. His top 3 favorites?
- Airheads:
“They won’t survive the day around me.” - Nerds Rope Clusters:
“Game-changer. Worth the stomachache.” - Chewy Sprees:
“Has to be chewy; perfect crunch and chew balance.”
When he’s not snacking on sugar or running marathons, you’ll likely find him golfing with fellow iFIT Trainer (and close friend) John Peel. “He’s too fit and too handsome,” Casey jokes. “I sneak in push-ups when he’s not looking.”As for post-workout meals, Casey skips the term “cheat meal” and focuses on balance. His favorite: a medium-rare New York strip steak with sautéed onions, mushrooms, rice, and a salad. Bonus: a big mug of ice cream.
Train with Casey Now
While you wait for the 2025 Boston Marathon® Series, jump into one of Casey’s current programs:
- Bryce Canyon Interval Series
- New England Interval Series
- Germany Holiday Walk & Jog Series
- Uzbekistan Interval Series
- 2021 Virgin Money London Marathon® Series
Whether you’re training for your first race or just enjoying the journey, Casey brings the energy, guidance, and good humor to keep you moving.
Disclaimer: The primary purpose of this blog post is to inform and entertain. Nothing on the post constitutes or is intended to be a substitute for professional medical advice, prevention, diagnosis, or treatment. Reliance on any information provided on the blog is solely at your own risk. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition, and please consult your doctor or other health care provider before making any changes to your diet, sleep methods, daily activity, or fitness routine. Do not disregard professional medical advice or delay seeking it because of information available on this blog. NordicTrack assumes no responsibility for any personal injury or damage sustained by any recommendations, opinions, or advice given in this article. Always follow the safety precautions included in the owner’s manual of your fitness equipment.Disclaimer: This blog post is not intended to replace the advice of a medical professional. The above information should not be used to diagnose, treat, or prevent any disease or medical condition. Please consult your doctor before making any changes to your diet, sleep methods, daily activity, or fitness routine. iFIT assumes no responsibility for any personal injury or damage sustained by any recommendations, opinions, or advice given in this article. Always follow the safety precautions included in the owner’s manual of your fitness equipment.
Opinions of iFIT Trainers are not necessarily the opinions of iFIT.
