Independence Day fitness traditions — the Murph workout origin and 4 family-friendly variants

Educational journalism, not medical advice. Every claim here is checked against its cited sources by editor Tim Bunce — a health writer, not a physician. It isn’t specific to your situation: for health decisions, talk to your own clinician. How we work →

The Lt. Michael Murphy story and origin

Lt. Michael P. Murphy was a US Navy SEAL who led a four-man reconnaissance team in Kunar Province, Afghanistan. He was killed on June 28, 2005 during Operation Red Wings, and was posthumously awarded the Medal of Honor for exposing himself to enemy fire to call for reinforcements when the team's communications had failed.5 The operation was later recounted in Marcus Luttrell's memoir Lone Survivor and the film of the same name.

The workout that bears his name was published by CrossFit as a "hero workout" in the months after Murphy's death. It was first widely adopted as a Memorial Day tradition, with July 4 emerging as a secondary occasion in the years that followed — particularly outside the United States, where Memorial Day has less resonance. (We have not been able to verify the popular claim that Murphy himself performed the routine under the name "Body Armor," so we leave that detail aside.)

The full Murph workout structure

The prescribed (Rx) Murph:

• 1-mile run (1,600 m)
• 100 pull-ups
• 200 push-ups
• 300 air squats
• 1-mile run

Performed wearing a 20-pound (9 kg) weighted vest. The middle reps — pull-ups, push-ups, squats — can be partitioned in any order. Many athletes break them into rounds, a common structure being 20 rounds of 5 pull-ups, 10 push-ups, and 15 squats. Completion times vary widely with fitness; recreational athletes who can finish the prescribed version may take an hour or more.

The cardiovascular and muscular demand is substantial: the full sequence of a mile run, 100 pull-ups, 200 push-ups, 300 air squats, and a second mile run places a heavy load on both the heart and the working muscles.1 The combined eccentric loading from hundreds of push-ups and pull-ups produces marked delayed-onset muscle soreness in those unaccustomed to the volume.3

Why scaling matters

High-volume bodyweight exertion of the Murph type carries a real risk of exertional rhabdomyolysis — muscle breakdown that places a load on the kidneys. Documented cases of this kind of injury following an extreme bodyweight exercise program have been published in Military Medicine.2 The pattern is recognisable: athletes attempt the prescribed version without sufficient preparation, the pulling and pushing volume exceeds their tolerance, and form deteriorates as fatigue accumulates.

A sensible approach to scaling follows a few principles: reduce volume before adding load; partition the reps to manage local muscular fatigue; and skip the vest if any of the movements break form. The four variants below apply these principles for non-CrossFit audiences — families, beginners, and older adults — who want to honor the day without the injury risk.

Variant 1 — Half Murph (1/0.5/100/200/0.5)

The most direct scaling: cut every component in half.

• 800 m run (half a mile)
• 50 pull-ups
• 100 push-ups
• 150 air squats
• 800 m run

No weighted vest. Partition the middle reps in 10 rounds of 5 pull-ups, 10 push-ups, 15 squats.

The Half Murph delivers about half the total work but shares a similar pacing problem: adults who have not been doing pull-ups regularly will reach muscular failure on the pull-ups long before the squats. Ring rows (or inverted rows — feet on the ground, body pulled up under a low bar) substitute well, keeping the upper-back stimulus without requiring strict pull-up capacity. The inverted/ring row is an effective pulling substitute that produces meaningful latissimus dorsi and upper-back activation at a more achievable strength threshold.4

Variant 2 — Modified body-weight only

For athletes who can run a mile comfortably but do not have access to a pull-up bar:

• 1-mile run
• 50 inverted rows (using a sturdy table or low bar)
• 100 push-ups (knees down as needed)
• 200 air squats
• 1-mile run

This variant maintains the running volume and reduces the upper-body load to a more manageable level for most adults. The inverted row substitution preserves the pull movement pattern, and the same evidence on inverted/ring rows supports it as an effective pulling option.4 Without some pulling movement, the workout becomes 200 push-ups and 200 squats — disproportionately push-dominant for the upper body.

Dropping to knee push-ups when form starts to break is a legitimate scaling, not a concession. Reducing the load lets you keep accumulating quality repetitions rather than grinding out failing ones, which is exactly the kind of form deterioration that drives the injury pattern above.

Variant 3 — Family-friendly team Murph

For households with multiple participants of varying capacity, a team version distributes the workload:

• Total team work: 1-mile run, 100 pull-ups or ring rows, 200 push-ups, 300 squats, 1-mile run
• Each member contributes what they can. A family of four might split the reps so that the two fittest adults take the largest share, a teen a smaller share, and an older relative the rest, until the team total is reached. The mile run can be a walk for some participants and a jog for others, completed at individual paces.

This is offered as a practical way to keep everyone involved rather than as a research-backed claim about family exercise. The appeal is simple: it lets people of very different fitness levels mark the day together.

Variant 4 — Murph walk-and-bodyweight

For adults whose running options are limited (joint issues, untrained, post-injury):

• 15-minute brisk walk (replacing the first 1-mile run)
• 25 ring rows
• 50 push-ups (any variant)
• 75 squats (or sit-to-stand from a chair if knees flag)
• 15-minute brisk walk

This variant is aimed at older adults in reasonable health and at adults of any age who have been sedentary for an extended period. As always, anyone with a medical condition or a long lay-off should clear new exercise with their doctor first.

The pacing principle for this variant: rest as needed during the bodyweight middle section. There is no clock pressure. The point is completing the work, not finishing in any specific time.

Recovery from the day after

The eccentric loading of high-volume push-ups and pull-ups produces marked delayed-onset muscle soreness (DOMS) in those unaccustomed to the volume. DOMS typically peaks roughly 24 to 72 hours after the workout.3 For soreness after this kind of high-volume eccentric work, light aerobic exercise (walking, easy cycling) as active recovery relieves symptoms more reliably than ice baths, stretching, or other passive approaches.3

Hydration deserves attention too. Because high-volume bodyweight exertion carries a real risk of exertional rhabdomyolysis,2 a practical approach is to drink to thirst before, during, and after the workout rather than forcing large volumes — more is not automatically better — and to eat a normal meal around the session.

Red or brown urine in the 24 to 48 hours after a high-volume bodyweight workout is a medical emergency. It can signal rhabdomyolysis and warrants an immediate emergency department visit.2 The condition is treatable when caught early but can damage the kidneys if ignored.

Practical takeaways

• Murph honors Lt. Michael Murphy, killed in Afghanistan in 2005; the workout has become a July 4 and Memorial Day tradition.5
• The Rx version (1 mile run, 100 pull-ups, 200 push-ups, 300 squats, 1 mile run, 20-pound vest) is a heavy cardiovascular and muscular load and requires real pre-training.1
• Scale down rather than push through inadequate preparation — high-volume bodyweight exertion of this type can cause exertional rhabdomyolysis.2
• Four scaled variants (Half Murph, body-weight modified, team format, walk-and-bodyweight) extend the tradition to all fitness levels.
• Hydrate sensibly, and watch for dark urine in the following 48 hours as a rhabdomyolysis warning sign.2

Extended takeaways

The Murph tradition has captured something that most holiday rituals don't: a structured way to mark the day through shared physical effort that ties to a specific story and a specific person. By attaching a workout to a fallen service member, the hero-workout convention turns a training session into a small act of remembrance.

The injury concern is real, not hypothetical. The published case material on extreme bodyweight programs describes a recognisable profile: a recreationally fit adult, training inconsistently, attempting the prescribed version — because they did it last year, or because the gym's workout that day uses no scaling — and reaching the high-rep portion with form deteriorating.2 The window in which rhabdomyolysis symptoms develop overlaps with the window in which DOMS peaks,3 so soreness can mask a more serious problem. The single most important practical guidance — scale to a variant if you have not specifically trained for the full version — is the one most often ignored.

For Canadian readers, the holiday calendar offers a useful structure. Canada Day (July 1) and the Fourth of July (July 4) are three days apart. Households that mark both can plan a tapered approach: a lighter active day on July 1 (the Wasaga-active routines from our Canada Day article), recovery and meal preparation on July 2 to 3, and a scaled Murph attempt on July 4. Two adjacent holidays naturally produce a rest-and-effort pattern, in contrast to three consecutive sedentary BBQ days.

Frequently asked questions

How much training do I need before attempting the full Murph?

There is no single validated prerequisite, but a practical rule of thumb is that you should already be comfortable with a substantial number of strict pull-ups and push-ups in a single session, able to run several kilometres without distress, and have a consistent training history of a couple of months. Given that high-volume bodyweight exertion can cause rhabdomyolysis,2 if you fall short of those baselines, scale to a variant rather than attempting the Rx version.

Can I break the workout into multiple days?

Yes, and the Murph spirit allows for it. Some gyms run a "Murph week" with the components distributed across several sessions in early July. Spreading the volume lowers the per-session load, which makes it a reasonable approach for older athletes or those returning from injury.

What about heat — can I do Murph outside on July 4?

Exercising on hot days makes you more likely to become dehydrated and to develop a heat-related illness, so the CDC advises scheduling activity for the cooler parts of the day and drinking more water than usual without waiting until you feel thirsty.6 As a general matter, high humidity makes it harder for sweat to evaporate,6 and anyone who is not used to exercising in the heat has more reason to be cautious. Start early in the day, hydrate sensibly in advance, ease off on pace, and consider an indoor variant when it is very hot. (We've removed a specific performance-impairment figure that appeared in an earlier draft because we could not verify its source.)

Is the workout safe for teenagers?

Bodyweight training can be appropriate for healthy, active teenagers under adult supervision, but it should be scaled to their experience, and the full Rx Murph with a weighted vest is not appropriate for young or untrained adolescents. Because we could not verify the specific guideline cited in an earlier draft, we recommend that parents consult a qualified coach or the teen's physician before any supervised attempt.

Should I take ibuprofen or other anti-inflammatories afterward?

Rather than reaching for medication, the better-supported recovery tool for this kind of soreness is light active recovery, which relieves DOMS more reliably than passive measures.3 If you are considering anti-inflammatories for pain relief or have any kidney concerns, check with a pharmacist or doctor first — particularly given the rhabdomyolysis risk associated with high-volume bodyweight work.2

References