CrossFit Athletes: 23 lb, 36 lb, or 45 lb? Picking Your Competition Weight

With Memorial Day right around the corner, tens of thousands of athletes around the world are gearing up to take on one of the ultimate fitness tests: The Murph Hero WOD. This brutal workout is designed to honor Navy Lieutenant Michael Murphy, who was tragically killed in action in Afghanistan in 2005.

If you’ve ever done it, you know it’s a physical and psychological battle. If you haven't... brace yourself. To ensure your Memorial Day workout is memorable for your performance—and not a medical emergency caused by terrible gear choices—here is your definitive guide to picking the right weight vest and understanding the strength metrics needed to compete.

Is a Weighted Vest Great for CrossFit?

Yes, a weighted vest is a staple of CrossFit training. It is the signature element of iconic benchmark workouts like "Murph" and is regularly featured at the CrossFit Games to test an athlete's elite work capacity.

While walking dominates daily use, a dedicated 6% to 8% of users specifically deploy their weight vests for high-intensity CrossFit training and the Murph challenge. 

According to a survey of 1,069 verified US weighted vest purchasers conducted between January 15 and February 1, 2026 by Zelus:

Participants: 61% Female, 39% Male | US Only | Average Age: 43

Methodology: Verified post-purchase digital questionnaires tracking athletic usage habits, gear failure points, and user biomechanical feedback.

While it is perfect for overloading strict bodyweight gymnastics (pull-ups, push-ups, squats) and boosting cardiorespiratory demand during runs or engine intervals, it can become a joint liability during high-velocity kipping movements or high-impact bounding if your core stability isn't fully established. 

Because CrossFit involves extreme physical transitions, the key to safety and performance is bypassing loose, bulky options and selecting a slim-profile plate carrier that ensures a secure, zero-bounce fit. 

How to Choose Your Perfect Weighted Vest for CrossFit?

Out of the comprehensive quantitative survey of 1,069 verified US purchasers conducted by Zelus, a sample of dissatisfied users (n=36) highlighted the primary flaws in current market designs: An overwhelming 67% to 75% of dissatisfied users cited uncomfortable wearability and inconvenient donning/doffing (difficulty putting the vest on or taking it off) as the core reason for their frustration.

When you are dropping into hundreds of repetitions, that 6% to 8% represents the absolute highest demand placed on a vest's structural integrity. Any minor stability defect will be amplified a thousandfold when jumping onto a pull-up bar, dropping into handstand push-ups, or running miles. Choosing the right vest requires balancing extreme capacity with a secure, zero-bounce fit.

The Golden Rules of Weight Vest Selection

Before diving into specific loads, let’s establish a baseline. Vests generally fall into two categories: plate carriers (slim-profile vests that hold solid steel plates) and adjustable pocket vests (which use sandbags or iron ingots).

Beginner Tip: If you are new to weighted training, ignore the heavy standards entirely. A safe starting point is choosing a vest loaded to 5% to 10% of your total body weight. This allows your connective tissues and spine to adapt to downward compressive forces without destroying your mechanics.

A Simple Guide to Buying Your First Weighted Vest

Breaking Down the Weights: From RX to Extreme Strength

The load you choose dictates the type of stimulus your body receives. Here is how the most common weight vest increments function in training:

The 20 lb (Men) / 14 lb (Women) Standard (The "RX" Sweet Spot)

This is the official gold standard popularized by CrossFit and The Murph Challenge. It is intentionally engineered to balance metabolic conditioning with resistance.

• The Stimulus: Designed for high-volume bodyweight gymnastics (pull-ups, push-ups, air squats) and mid-distance running.
• The Benchmark: As a general rule of thumb, you should only attempt an RX weighted Murph if you can complete the entire workout completely unweighted in under 41 minutes with flawless form.
• Best Vest Style: Slim-profile plate carriers are ideal here because they hug the torso tightly, preventing the vest from bouncing and hitting your chin during runs or double-unders.

The 23 lb Weight (The Tactical Bridge)

Commonly utilized in professional performance kits and elite military prep, this weight is slightly heavier than the standard RX load.

• The Stimulus: It serves as a bridge between classic functional conditioning and heavy tactical operations.
• The Application: Use this weight if the 20 lb vest no longer challenges your cardiovascular system, but you still want to maintain fluid running mechanics without shifting into a slow rucking stride.

The 36 lb Weight (Advanced Strength Capacity)

A massive jump from the RX standard, a 36 lb vest completely alters your center of gravity and places extreme loading on your spine and shoulders.

• The Stimulus: This weight shifts the workout from a cardiorespiratory focus to a pure muscular endurance and strength test.
• The Application: Best reserved for shorter sprint-carries, heavy box step-ups, or rucking. High-volume gymnastics movements—especially dynamic ones like kipping pull-ups or toes-to-bar—should be strictly avoided at this weight to prevent severe joint strain.

The 45 lb Weight (Extreme Strength & Tactical Conditioning)

This is the heavy artillery of vest training. A 45 lb vest is designed almost exclusively for powerlifters, advanced rucking, or elite tactical personnel preparing for real-world deployment loads.

• The Stimulus: Pure structural capacity and core stabilization.
• The Application: At this weight, traditional high-intensity CrossFit metcons are off the table. Dynamic bodyweight movements like burpees or bounding box jumps can easily overload your spine and knees upon impact. Instead, use this load for strict pull-ups, push-ups, heavy lunges, and structural rucking.

Your Current Bodyweight (The 10% Baseline Rule)

Your mass dictates how much extra downward force your connective tissues can safely handle.

• Under 150 lbs (68 kg): Jumping straight to a standard 20 lb RX vest means adding over 13% of your body weight in one go. If you fall into this category, you need a highly adjustable pocket vest or thin, modular plates so you can incrementally build up from 10 lbs.
• 150 lbs to 200 lbs (68–91 kg): You fall into the standard zone where a 14 lb or 20 lb vest aligns beautifully with human biomechanics for dynamic movement.
• Over 200 lbs (91 kg+): Your joints are already carrying significant mass. When adding a vest, ensuring an ultra-tight, contoured fit is paramount to prevent the vest from gaining momentum during high-impact movements like box jumps or running.

Read More: What Size Weighted Vest Should I Get 

Your Unweighted Murph Time

Your fastest unweighted Murph time is the ultimate indicator of your work capacity and gymnastics efficiency.

• Sub-40 Minutes: Your capacity is exceptional. Your tendons, cardiovascular system, and muscular endurance are fully prepared to handle the standard 20 lb (men) vest / 14 lb (women) RX vest without breaking form.
• 41 to 50 Minutes: You have a solid aerobic base, but strapping on a full RX vest right now will likely cause your movement to grind to a halt during the push-ups and pull-ups. Your ideal setup is a scalable vest loaded to about 10–12 lbs (for men) or 6–8 lbs (for women) to bridge the gap.
• 50+ Minutes or Scaled: If you are still working on mastering unweighted high-volume gymnastics, a weight vest will only compromise your mechanics. Your ideal setup is no vest yet. Master the mechanics unweighted first!

Your Primary Goal

What are you actually trying to achieve when you put the vest on?

Best Weighted Vest for CrossFit Athletes

If you are looking for a rugged, mission-grade plate carrier designed to handle heavy-duty training, the Zelus FWV-HT is built exactly for that purpose. Engineered for high-intensity disciplines like CrossFit, Rucking, and pure strength training, this vest is tailored for athletes who want to push their absolute limits.

10 Best Weight Vest CrossFit Workouts

Strapping on extra weight fundamentally changes the stimulus of a workout, demanding more from your lungs, your legs, and your mind. Here are the 10 best CrossFit benchmark and hero workouts to tackle with a vest.

The Benchmarks: From Classic Hero Wods to Brutal Triplets

Advanced Grunt Work: Heavy Bars and Complex Gymnastics

7 Best Weighted Vest Exercises 

How Strong Do You Need to Be to Compete in CrossFit?

If you watch the CrossFit Games, you see athletes moving jaw-dropping weights while sprinting like track stars. It’s easy to assume you need world-class powerlifting strength just to step onto a local competition floor.

However, real coaching data and elite-level testing reveal a more nuanced truth: Strength absolutely matters, but it is only one piece of a highly complex performance puzzle.

"Strong Enough" vs. "As Strong As Possible"

CrossFit is not a pure strength sport. Unlike powerlifting or Olympic weightlifting, where maximal load is the sole metric of success, CrossFit demands a blend of maximal strength, strength endurance, gymnastics capacity, and metabolic efficiency under extreme fatigue.

Because of this, the real question is: Are you strong enough to express your fitness in competition? Beyond a specific threshold, chasing increases in your 1RM produces diminishing returns. If a massive deadlift comes at the expense of your aerobic engine, it becomes a liability rather than an asset.

The Strength Benchmarks

At the highest level of the sport (Games and Semifinals), numbers have hit a natural human balance point for multi-sport fitness. For serious intermediate athletes (Quarterfinals or local competitions), the targets are accessible but highly defined.

The Elite Takeaway: The limiting factor at the top level is rarely raw strength. It is the athlete's ability to apply 80% of that max strength repeatedly while their heart rate is redlined at 180 beats per minute.

Key Performance Limiters

Why Olympic Lifts Trump Power Lifts

Movements derived from Olympic weightlifting—the snatch and clean & jerk—are far more predictive of competitive CrossFit success than slow, maximal powerlifting lifts like the bench press.

CrossFit heavily tests barbell efficiency and explosive power under fatigue. In a competition setting, an athlete with a technically flawless 225 lb clean & jerk will almost always beat an athlete with an ugly, muscled-out 250 lb lift because the former wastes far less energy per repetition.

The Real Bottleneck: Strength Endurance

A major trap intermediate athletes fall into is assuming a higher 1RM fixes everything. They believe going from a 315 lb to a 375 lb back squat will automatically make them faster in a workout.

In reality, max strength builds capacity, but strength endurance wins workouts. To break through, elite training programs shift away from heavy singles and focus heavily on:

• High-power barbell cycling intervals.
• Repeated submaximal lifting under tight time constraints.
• Mixed-modal conditioning (e.g., heavy cleans mixed directly with rowing and burpees).

Where Should You Focus Right Now?

Your training focus should change dynamically based on where your numbers currently sit:

1. Early / Developing Athletes: Focus heavily on building a baseline of general strength, gaining lean muscle mass, and mastering basic movement mechanics unweighted.
2. Intermediate Athletes: Work aggressively to hit the minimum strength thresholds noted above while introducing barbell cycling and stamina work.
3. Advanced / Elite Athletes: Maintain your current strength ceilings while prioritizing sport-specific conditioning, fatigue-based performance, and refining movement weak links.

You need to be strong enough that strength is not the reason you lose. Reaching intermediate benchmarks unlocks total access to competitive functional fitness. But past those points, the crown will always go to the athlete with the best endurance, the sharpest skills, and the highest movement efficiency. Strength is essential—but it is never the whole story.

The Finish Line: Gear Up with Intention

Whether you are stepping onto the tarmac for a weighted Murph this Memorial Day or pushing for a new spot on the local leaderboard, remember that your gear dictates your performance ceiling. A weighted vest is a phenomenal training tool, but it is entirely unforgiving to bad form and mismatched weights.

Be honest with your current strength, respect your body’s biomechanics, and choose the load that matches your true operational goals. At the end of the day, CrossFit isn’t won by the athlete who puts on the heaviest vest just to suffer through broken mechanics; it’s won by the one who moves with flawless efficiency, relentless consistency, and a razor-sharp engine.

Pick your weight, strap it down tight, and go shatter your next PR safely.