Semi-private strength training typically involves groups of two to six people. This format balances individualized coaching with the social energy of a small team. At Colfax Strong Strength & Conditioning in Denver, sessions are capped at four athletes to ensure every participant receives dedicated attention. This specific group size allows coaches to monitor form closely while maintaining a collaborative atmosphere that drives consistent results.
Defining the Semi-Private Model
Semi-private training is a coaching format where a small group of individuals follows their own custom workout plans while sharing a single coach. Unlike large group fitness classes where everyone performs the same movements simultaneously, semi-private sessions allow for individualized programming. Each athlete works toward their specific goals, whether that is building foundational strength, preparing for a race, or recovering from an injury. The coach moves between participants, offering real-time feedback and adjustments tailored to each person's needs.
This model sits between one-on-one personal training and large group classes. It provides the structure and accountability of personal training at a more accessible cost point. The key differentiator is the level of personalization. In a true semi-private setting, the workout is written for you, not for the group. This ensures that your training age, injury history, and specific objectives are respected in every session.
Why Four Is the Ideal Group Size
Research and industry standards suggest that group sizes between two and six people offer the best balance of cost and coaching quality. However, smaller groups often yield better outcomes for technical skill development. At Colfax Strong, the semi-private program is capped at four athletes per session. This limit ensures that the coach can provide meaningful feedback to every individual without rushing through the workout. according to Personal training industry
When a group exceeds six people, the coach's attention becomes diluted. It becomes difficult to correct form in real time or make load adjustments for specific individuals. By keeping the group to four, the coach can observe each athlete's movement patterns closely. This level of oversight is critical for preventing injury and ensuring that progressive overload is applied safely. The smaller group size also fosters a stronger sense of community and accountability among training partners.
Official HYROX Affiliate Programming
Colfax Strong is an official HYROX affiliate, which means our programming is designed specifically for the demands of the HYROX race format. HYROX is a global fitness competition that combines running with functional workout stations. As an official affiliate, we provide structured preparation that aligns with the official race standards. This status ensures that our training methods are recognized and relevant to athletes competing in HYROX events worldwide.
Our HYROX programming launches on June 18. We offer a comprehensive schedule to accommodate different lifestyles and training preferences. On Thursdays, we run eight distinct class times: 5:30 AM, 6:30 AM, 7:30 AM, 12:00 PM, 3:30 PM, 4:30 PM, 5:30 PM, and 6:30 PM. On Saturdays, we offer a dedicated 90-minute class at 7:30 AM. This extensive schedule allows athletes to train consistently without disrupting their work or family commitments. The official affiliate status guarantees that our coaching is aligned with the latest HYROX guidelines and race-day expectations.
Comparing Training Formats
Understanding the differences between training formats helps you choose the right fit for your goals. One-on-one personal training offers undivided attention but comes at a premium price. Large group classes are more affordable but offer less individualized coaching. Semi-private training strikes a balance by providing custom programming in a small group setting. This format is ideal for those who want the benefits of personal training without the full cost of solo sessions.
The following table summarizes the key differences between these formats:
| Format | Group Size | Personalization | Coach Attention |
|---|---|---|---|
| One-on-One Personal Training | 1 | Fully Custom | Undivided |
| Semi-Private Training | 2-4 | Individualized | Shared but Focused |
| Group Fitness Class | 10+ | Standardized | Minimal |
For most athletes, semi-private training offers the best value. You receive the expertise of a certified coach and a program designed for your body, while also benefiting from the motivation of training alongside others. This format is particularly effective for those who struggle with consistency when training alone.

Key Takeaways
- Semi-private training typically involves groups of two to six people.
- Colfax Strong caps semi-private sessions at four athletes to maximize coaching quality.
- Smaller groups allow for better form correction and individualized programming.
- Colfax Strong is an official HYROX affiliate with programming launching June 18.
- Thursday HYROX classes are available at eight different times, from 5:30 AM to 6:30 PM.
- A Saturday HYROX class is offered at 7:30 AM for 90 minutes.
- Semi-private training offers a cost-effective alternative to one-on-one personal training.
Frequently Asked Questions
How many people are in a semi-private training session?
Semi-private training sessions typically include two to six people. At Colfax Strong, sessions are capped at four athletes to ensure high-quality coaching.
Is semi-private training the same as group fitness?
No. In group fitness, everyone follows the same workout. In semi-private training, each person follows their own custom plan while sharing a coach.
Does Colfax Strong offer HYROX training?
Yes, Colfax Strong is an official HYROX affiliate. Our HYROX programming launches on June 18 with classes on Thursdays and Saturdays.
What are the HYROX class times at Colfax Strong?
Thursday classes are at 5:30 AM, 6:30 AM, 7:30 AM, 12:00 PM, 3:30 PM, 4:30 PM, 5:30 PM, and 6:30 PM. Saturday classes are at 7:30 AM.
Can I drop in for a semi-private session?
Drop-ins for semi-private sessions are limited to those from out of town or with prior experience. We recommend booking a free intro to discuss your goals.
Start Your Training Journey
Choosing the right training format is the first step toward achieving your fitness goals. Semi-private training offers the perfect blend of personalization and community. At Colfax Strong, we are committed to providing high-quality coaching in a supportive environment. Whether you are preparing for HYROX or building foundational strength, our team is here to guide you. Claim Your Free Intro at Colfax Strong Strength & Conditioning in Denver, CO to get started today.
