What Is the 20 lb Vest Murph Challenge?
The classic Murph workout—named after Navy Lt. Michael Murphy—involves a 1-mile run, 100 pull-ups, 200 push-ups, 300 air squats, followed by another 1-mile run. For the full Rx experience, you wear a 20 lb weighted vest throughout. This extra load transforms the entire event from a high-volume bodyweight grind into a true feat of tactical endurance.
Why 20 Pounds?
The 20 lb weight has historical roots and offers a serious but accessible load for most. It simulates military gear and demands more from your cardiovascular system and muscle endurance, making every movement more taxing.
Choosing the Best 20 lb Weight Vest
Not all vests are created equal. Comfort, stability, and adjustability matter a lot during high-rep calisthenics and running. Here are a few of my hard-earned recommendations:
- Wolf Tactical Adjustable Weighted Vest: Lightweight yet secure and easy to adjust, making it a reliable option for Murph and other endurance challenges.
- 5.11 Tactical Unisex TacTec Trainer Weight Vest: The go-to pro standard—secure fit, breathable, with easy plate adjustments.
- Kensui EZ-VEST® MAX V2 (300 lbs): For those wanting the most secure, zero-bounce experience. Plate-loaded and customizable, this one is for advanced calisthenics and rucking.
How to Prepare for Murph With a 20 lb Vest
Getting through Murph with a vest isn’t just physical—it’s mental. Here’s my advice after coaching hundreds through their first time:
- Progress gradually: Work up to longer sets with the vest before Murph. Don’t jump from zero to 20 lbs overnight.
- Partition reps: Consider the “Cindy” format (20 rounds of 5 pull-ups, 10 push-ups, 15 squats) to manage fatigue.
- Practice transition: Your vest should stay tight and balanced on both runs and bodyweight work. Train with the exact vest you’ll use on event day.
- Stay hydrated: A 20 lb vest increases core temperature and sweat rate. Hydrate early and often.
How Many Calories Do You Burn During Murph?
Adding a 20 lb weighted vest seriously amps up calorie burn. Curious how many you torch in Murph? Use our specialized calorie calculator below to estimate your total calorie burn based on your body weight, vest load, and workout duration:
Try the Rucking Calorie Calculator—estimate your burn for Murph and every weighted vest session.
Final Thoughts: Earn It
Murph isn’t just another workout—it’s a test of dedication. A quality 20 lb vest makes a huge difference in both safety and challenge. Choose gear that fits right, build up thoughtfully, and respect the work. You only get one body—train it for life.
