Written by: Chris Butt, Certified Personal Trainer & Weight Loss Coach, Premier Fitness Camp
Weight loss retreats work when they focus on fat loss, muscle preservation, and behavior change instead of short-term scale drops. The key issue is not whether you lose weight, but whether you lose fat while keeping muscle.
Standard dieting programs typically produce a 60/40 split between fat loss and lean muscle loss. A 2026 study published in Radiology by University of California, San Francisco researchers found that people with repeated weight cycling lost nearly four times as much thigh muscle over four years as those whose weight remained stable. Weight cyclers lost about 3.7% of thigh muscle volume versus 1% in non-cyclers. Lead author Thomas Link, MD, PhD, explained that people who cycled weight lost large amounts of muscle along with fat and did not regain that muscle. Most programs reinforce that damaging cycle.
Premier Fitness Camp breaks that pattern. A case study conducted with the University of California, San Diego (UCSD) evaluated participants who stayed four or more weeks and received DEXA scans, the gold standard for body composition, at the start and end of their program. The study found that 94% of total weight loss was purely fat, while lean muscle mass was preserved or increased. Bone volume and metabolic capability also stayed stable. This outcome is far better than the 60/40 ratio seen in typical dieting programs.
Progress is tracked across 17 data points weekly through a personalized Report Card. Those data points include:
A 3–4:1 client-to-trainer ratio gives every participant focused coaching in each session. With more than 1,200 reviews and a 90%+ five-star rating, results are backed by both research and client experience.
Irene Tchaikovsky described her stay this way: “What began as a simple one-week reboot has transformed into a complete lifestyle shift. We equip you with the knowledge, tools, and support to make meaningful and sustainable changes.”
The muscle-preservation challenge becomes even more critical for the growing number of people using GLP-1 medications. GLP-1 receptor agonists such as semaglutide and tirzepatide have reshaped the weight-loss landscape, yet they can amplify the same fat-to-muscle loss pattern seen with standard dieting when not paired with strength training and adequate protein.
A 2026 Vanderbilt University Medical Center retrospective study published in JAMA Network Open, which analyzed 1,809 patients treated with semaglutide or tirzepatide from 2018–2023, reported substantial reductions in fat mass with modest decreases in fat-free mass. The authors emphasized that maintaining lean mass remains critical because higher fat-free mass is linked to lower mortality risk.
The clinical guidance on muscle preservation during GLP-1 use is consistent. Cleveland Clinic endocrinologist Anira Iqbal, MD, states that a combination of strength training and aerobic exercise helps ensure that most of the loss comes from fatty tissue. She also warns that lost muscle is very difficult to regain. The 2026 Endotext chapter on behavioral approaches to obesity management recommends protein targets of 1.2–1.6 g/kg of body weight, at least 150 minutes of moderate aerobic activity per week, and resistance training twice weekly to limit muscle loss.
NASM guidance for GLP-1 users goes further and specifies full-body resistance training three to four times per week with compound lifts at 70–85% of one-rep max. It also recommends daily protein intake of 1.6–2.2 g/kg body weight to support muscle protein synthesis and protect lean mass and bone density.
Premier Fitness Camp’s GLP-1 muscle-preservation protocol brings these evidence-based elements together:
Omada Health data from more than 150,000 GLP-1 members shows that members who discontinued GLP-1 medication before 12 months still achieved 13.1% average weight loss at 12 months when supported by structured behavioral programming. That result outperforms the 6.8% average seen in broader real-world evidence. Premier Fitness Camp’s immersive, education-first model provides the kind of intensive behavioral support that drives those outcomes.
If you are using or recently stopped GLP-1 medication, talk to our team about our muscle-preservation protocols and how we can support your transition. Call (888) 488-8936 or schedule your consultation online.
Adults with 40–70 pounds to lose at Premier Fitness Camp average 3–4 pounds of fat loss per week. That figure reflects real fat reduction, not water loss or muscle loss, as confirmed by the UCSD study described earlier.
Individual results vary based on starting weight, hormones, medications, and biology. Because progress is tracked across many health markers through the weekly Report Card, improvements are visible even when the scale moves more slowly. Clients often see early gains in blood pressure, cholesterol, glucose, mile time, strength, and body measurements that match or precede changes on the scale.
Lauren M. lost 140 pounds, going from 320 to 180 pounds, and shared her story on The Today Show: “I found myself again; got my confidence back; learned how, for my body type, I needed to eat and exercise; and most importantly, I learned how to adopt a healthy, sustainable lifestyle.” Crissy lost 109 pounds, from 512 to 403 pounds, and appeared on The Doctors: “This program has changed my life. I lost over 110 pounds, but more than that I have gained so much knowledge and strength, both physically and mentally.”
Scott planned a two-week stay and extended to eight weeks: “This is a life-changing experience. The facilities and staff are top notch.”
These outcomes, including 3–4 pounds of weekly fat loss, a 94% pure-fat-loss ratio, and sustained results, set a clear benchmark for luxury fitness retreats. The table below compares leading residential fitness and wellness programs on the factors that influence whether you can achieve similar results.
| Retreat | Est. Weekly Price | Outcome Summary | Key Differentiator |
|---|---|---|---|
| Premier Fitness Camp (Carlsbad, CA) | ~$6,000 | UCSD case study: 94% of weight loss was pure fat; lean muscle preserved or increased. | 17-point weekly tracking, 3–4:1 trainer ratio, Think/Eat/Move curriculum, Omni La Costa Resort, GLP-1 protocols, 50% alumni return rate. |
| Live In Fitness (Arizona) | Lower price point | Exercise-focused program; clients stay in a residential home and travel to off-site gym facilities. | Lower cost, extreme heat half the year, food delivered rather than prepared on-site, high staff turnover. |
| Canyon Ranch (Multiple locations) | Premium pricing | Wellness retreat experience with some fitness programming; less results-driven than medically supervised programs. | Established brand, more focused on retreat experience than measurable fat-loss outcomes. |
| Unite Fitness Retreat (Salt Lake City, UT) | Varies | GLP-1 medical support add-on with 90-day medication and weekly check-ins; downtown hotel location. | Downtown urban setting, cold half the year, guests travel to amenities, proprietary app for post-retreat tracking. |
| Pritikin (Florida) | Premium pricing | Longevity-focused program with a slower pace; high humidity climate in Florida. | Older demographic focus, fewer diverse activities, longevity orientation rather than active fitness transformation. |
| Civana Wellness Resort (Arizona) | Varies | Wellness and spa retreat; not primarily results-driven for fat loss. | Retreat and relaxation focus rather than structured weight-loss programming. |
| Hilton Head Health (South Carolina) | Varies | GLP-1 Support Experience available; guests housed off-site and transported daily to central facility. | Weight-loss focus, high humidity, off-site accommodations with daily transport, older demographic orientation. |
Use the criteria below to match your goals with the right type of program.
Lin Vela, a three-time attendee, put it simply: “Their trainers are knowledgeable, inspiring and make hard work fun. The food is amazing!”
Premier Fitness Camp is built on three integrated pillars: Think, Eat, Move.
Think addresses the behavioral and psychological roots of weight gain. Licensed psychologists and behavioral health coaches lead group workshops on emotional eating, limiting beliefs, and life-work balance. One-on-one counseling is available for deeper issues. Meditation and inner-connection sessions appear throughout the week.
Eat delivers gourmet, calorie-controlled meals prepared on-site by wellness chefs using fresh, farm-to-fork ingredients. Registered dietitians design every meal and lead nutrition workshops on macros, portion control, healthy shopping, and meal planning. Cooking demonstrations show clients how to recreate healthy meals at home.
Move provides 4–5 hours of daily training Monday through Friday, with a half day on Saturday. Activities include bootcamp, boxing, barre, TRX suspension, Tabata, Zumba, spin, interval and resistance training, beach workouts, hiking at Torrey Pines and Double Peak, stand-up paddleboarding, and kayaking. All trainers hold at least a bachelor’s degree, many hold master’s degrees, and many have been with the program since its founding.
The setting is the 450-acre Omni La Costa Resort in Carlsbad, California, in North San Diego County, with a year-round moderate climate that supports outdoor training every day. Three spa treatments per week are included, chosen from more than 30 options at the La Costa Spa. Post-camp support includes virtual coaching, personalized meal plans, and ongoing communication with staff.
Jake Younger shared his experience: “I not only lost weight but gained confidence, strength, and a healthier lifestyle.” Paula L. added: “I am now off of my anti-depressants and have a whole new outlook on life physically, mentally and spiritually.”
Premier Fitness Camp supports GLP-1 users by focusing on muscle preservation and long-term independence from medication. The daily training program includes resistance work that targets compound movements and progressive overload, which are proven strategies for maintaining lean mass during calorie restriction. Registered dietitians adjust protein targets to the 1.2–1.6 g/kg range recommended for GLP-1 users. Behavioral health coaches help participants build sustainable habits for life after medication. Post-camp virtual coaching then provides a structured transition plan so GLP-1 use becomes more effective in the short term and less necessary over time.
Most clients see measurable changes in body composition, energy, and fitness markers within the first week. The UCSD case study found that long-term participants not only preserved lean muscle but increased it, which protected resting metabolic rate and supported weight maintenance after leaving. Post-camp support includes virtual coaching, personalized meal plans, and ongoing access to trainers via email. The Think, Eat, Move curriculum is designed to transfer skills to home life so clients know how to cook, how to train, and how to manage behavioral triggers that once led to weight regain. A 50% alumni return rate reflects both the quality of the experience and the trust clients place in Premier Fitness Camp as a long-term health partner.
Premier Fitness Camp works with a wide range of fitness levels, from 400-pound beginners who can initially walk only 250 feet to athletes who already train several times per week. Every class is structured so all fitness levels can participate and benefit. The 3–4:1 trainer ratio allows for individualized attention and modifications. Low-impact alternatives exist for every exercise, and a dedicated low-impact training track supports clients with health limitations such as knee pain, back injuries, or cardiovascular conditions. A comprehensive health assessment on day one, including blood work, vital signs, body composition, and a fitness test, ensures that each client’s program reflects their true starting point.
The weekly rate is approximately $6,000 and is fully all-inclusive. The price covers luxury accommodations at the Omni La Costa Resort, all meals and snacks prepared by wellness chefs, all fitness classes and training sessions, educational workshops in nutrition and behavioral health, cooking demonstrations, the comprehensive health assessment, weekly Report Card tracking, three spa treatments per week, access to all resort amenities, and post-camp virtual coaching and support. Zero-percent financing for up to six months with no down payment is available, and multi-week discounts apply for longer stays. The program may qualify as a tax-deductible medical expense; consult a tax professional for guidance on your situation.
Evidence shows that immersive, education-based residential programs that preserve muscle, track multiple health markers, and teach behavior change create results that last. The UCSD case study’s 94% pure-fat-loss finding, Premier Fitness Camp’s comprehensive weekly tracking, its 3–4:1 trainer ratio, and its Think, Eat, Move curriculum set a standard that no other California luxury fitness program has publicly matched. For adults 40–60 who have traded health for career demands and are ready to reclaim both, Premier Fitness Camp at Omni La Costa Resort offers an evidence-based path forward.
Ready to reclaim your health with an evidence-based approach? Book your consultation to discuss your goals and learn how Premier Fitness Camp can help you achieve lasting results. Call (888) 488-8936 or book your consultation online.