That nagging groin pain that shoots down your leg when you get out of bed. The clicking sound your hip makes when you walk upstairs. The stabbing sensation that stops you mid-workout.
Your hip labrum is a ring of cartilage lining the socket of your hip joint. Think of it as a gasket: it deepens the socket, maintains a negative-pressure seal, and keeps the femoral head centered precisely where it belongs. When it tears, that precision is disrupted. The joint doesn’t fail completely, but it becomes unreliable in ways that are difficult to ignore.
The good news is counterintuitive. The exercises for hip labral tear recovery don’t involve protecting the hip from movement. They involve building the muscles around it so effectively that the damaged tissue carries less load. The right program creates conditions in which many people return to full activity without surgery, even though the tear itself doesn’t disappear.
The program follows the stages of tissue healing: reducing irritation first, building strength second, and returning to movement third. Each exercise includes the specific reason it belongs in its phase, not just instructions for how to do it.
Understanding a Hip Labral Tear
Hip labral tears develop in two ways: through a single acute event (a fall, a sharp change of direction, a direct collision) or through years of repetitive loading that gradually degrades the cartilage. The second mechanism is more common, which is why runners, cyclists, and athletes in rotational sports account for a disproportionate share of diagnoses.
Anterior tears, located at the front of the hip socket, are the most frequent type. The anterior labrum is most at risk during deep hip flexion and combined flexion-rotation movements. Posterior tears are less common and tend to follow trauma or underlying impingement. Superior tears are often associated with hip dysplasia, where the socket is shallower than average and the labrum is required to carry more load than it would in a typically formed socket.
Common symptoms:
- Groin pain that may radiate into the thigh
- Clicking, locking, or catching sensations in the hip
- Pain that increases with sitting, squatting, or pivoting
- Stiffness after periods of rest
- Sharp pain when getting in or out of a low car seat
- Pain during prolonged sitting
Types of hip labral tears:
- Anterior tears: Most common, often from repetitive hip flexion or combined flexion-rotation
- Posterior tears: Less common, usually associated with trauma or hip impingement
- Superior tears: Often linked to hip dysplasia
If your imaging confirms an anterior tear, pay particular attention to hip depth throughout Phase 1 and Phase 2. Keep the hip above 90 degrees of flexion until symptoms have consistently settled. The anterior labrum is most at risk at end-range hip flexion, which means the exercises that seem harmless (sitting cross-legged, reaching down to pick something up) can be more provocative than exercises that look harder.
Can a Hip Labral Tear Heal Without Surgery?
The labrum is cartilage, not muscle. According to Johns Hopkins Medicine, labral tissue does not regenerate the way soft tissue does after a strain. The structural tear remains. What conservative management achieves is different: it rebuilds the muscles surrounding the hip strongly enough that the damaged labrum no longer carries as much mechanical load, reducing pain and restoring function even though the underlying anatomy hasn’t changed.
A 2022 study in Knee Surgery, Sports Traumatology, Arthroscopy tracking patients with pre-arthritic hip pain found that roughly half avoided surgery at a one-year follow-up. Factors that predicted a worse outcome with conservative care included longer symptom duration before starting rehabilitation, the presence of femoroacetabular impingement (FAI), and reduced physical function at baseline.
FAI carried the most weight: patients with a confirmed FAI diagnosis were more than three times more likely to progress to surgery than those without. That finding identifies a structural problem. Conservative management rebuilds the muscles around the hip. It cannot change the bony geometry that produces impingement. Which side of that divide a patient falls on is worth establishing with an orthopedic specialist before committing to a rehabilitation timeline.
The exercises in this program won’t repair the tear. They will build the muscular support that makes the tear less consequential.

What Pain Is Okay During Exercises?
Pain tolerance is not the goal of these exercises, and pushing through discomfort is not a strategy here. There’s a meaningful difference between the muscle fatigue that indicates productive work and the joint irritation that signals you’ve overloaded damaged tissue. Knowing the difference is the most important skill in this recovery.
Good pain (muscle fatigue):
- A burning sensation in the muscles being worked
- General muscle tiredness toward the end of a set
- Mild soreness in the worked muscles 24 to 48 hours after exercise
Bad pain (joint irritation):
- Sharp or pinching pain in the groin or deep in the hip
- Clicking or catching sensations during a movement
- Pain that worsens during an exercise or immediately after finishing
- Discomfort that persists for more than two hours after exercising
If you feel bad pain during any exercise, stop that movement. Your body is signaling that the load or range of motion exceeds what the joint can currently tolerate. Step back, not through.
Hip Labral Tear Phase Readiness Checker
Answer three quick questions to find out which phase you're ready for and what to focus on this week.
What is your average hip pain level at rest over the past three days?
0 = no pain at all / 10 = the worst pain you can imagine
How are your current phase exercises going?
Think about your most recent session — any sharp groin pain, or persistent discomfort after finishing?
How many weeks have you been consistently doing your current phase exercises?
Consistent means at least 4 out of 7 days per week, not occasional sessions.
This tool provides general guidance only. Your physical therapist or healthcare provider should have the final say on phase progression.
Hip Labral Tear Exercises to Avoid (And Safe Alternatives)
The exercises most likely to aggravate a hip labral tear involve deep hip flexion, rotational loading, or both. Deep squats compress the anterior labrum at its most vulnerable angle. Forward lunges combine hip flexion with forward knee travel in a position that many people with labral tears find provocative within the first few repetitions.
Hip flexor stretches that take the hip past 90 degrees of flexion can pinch already irritated tissue, even when the stretch itself feels good. The table below lists each high-risk movement alongside its safer alternative and the phase at which the riskier version can be reintroduced.
When people ask what aggravates a hip labral tear, the answer involves three variables: the angle of the hip, the load applied at that angle, and the speed of the movement. A deep squat at bodyweight is risky. A deep squat under a loaded barbell, performed fast, is far more so. Phase 1 and Phase 2 of this program are designed to build load tolerance gradually, so that Phase 3 movements become available without the joint reacting.
Red flag movements (stop immediately):
- Any movement that produces sharp, pinching pain in the groin
- Positions that create clicking accompanied by pain
- Exercises that cause pain lasting more than two hours after finishing
Phase 1: The Early Stage (Weeks 1-3) – Reducing Pain and Gentle Activation
Phase 1 is about not making things worse while quietly beginning to matter. The exercises look almost embarrassingly simple: lying on your back, small movements, no resistance. That’s intentional. The labrum is irritated. The surrounding muscles are guarding. The objective isn’t to build strength yet. It’s to activate the glutes, deep hip stabilizers, and core without adding mechanical stress to the damaged tissue.
The exercises in this phase are performed daily, 10 to 15 minutes per session. No equipment required.
1. Glute Bridge
Why it helps: Activating the glutes relieves the anterior hip structures of the load they were never designed to manage alone. A strong posterior chain shifts the compressive forces away from the labrum’s most vulnerable location. The bridge also trains the pelvis to move with your spine stable, a coordination pattern that deteriorates in many people with hip pain.
How to do it:
- Lie on your back with knees bent and feet flat on the floor, hip-width apart.
- Squeeze your glutes and press your feet into the ground as you lift your hips.
- Hold for 2 to 3 seconds at the top, keeping your pelvis level.
- Lower slowly, without dropping.

Sets/Reps: 2 sets of 15 reps, daily
Modification: Place a small pillow under your hips to reduce the range of motion if the full position causes discomfort.
Common mistake: Arching the lower back at the top of the movement. The pelvis should stay level, not tip anteriorly.
2. Clamshells
Why it helps: Clamshells are the exercise most patients underestimate. They look almost embarrassingly low-effort. That’s exactly why they appear in Phase 1.
The gluteus medius, which clamshells target, is frequently weak in people with hip labral tears, often from long before the injury occurred. When the gluteus medius is underperforming, adjacent muscles take on its stabilization role during walking and loaded movement, creating the subtle rotational stress at the hip joint that contributes to labral irritation in the first place. Clamshells don’t fix the tear. They begin correcting the mechanical environment that allowed it to develop.
A 2011 case series in the Journal of Orthopaedic & Sports Physical Therapy placed gluteus medius and gluteus maximus activation at the foundation of a phased conservative treatment program for patients with confirmed acetabular labral tears.
Gluteus medius weakness was identified as a consistent finding across the patient group. In weeks one through three, the hip isn’t ready for loaded resistance. Clamshells are the quietest, most joint-friendly way to start retraining the muscle that matters most in this recovery.
How to do it:
- Lie on your side with knees bent at approximately 90 degrees and hips stacked.
- Keep your feet together and rotate your top knee toward the ceiling.
- Hold for 2 seconds at the top without letting your pelvis roll back.
- Lower slowly and repeat.
Sets/Reps: 2 sets of 12 reps each side, daily
Modification: Perform the exercise with your back against a wall for support if your hip is highly irritated.
3. Core Activation: Dead Bug
Why it helps: The dead bug trains your core to stabilize while your limbs move, which is the exact coordination demand that protects the hip during daily activity. Most people think of core work as trunk flexion (sit-ups, crunches). The dead bug does the opposite: it teaches your abs to hold a neutral spine while limb movement creates the challenge.
How to do it:
- Lie on your back with arms reaching toward the ceiling and hips and knees bent at 90 degrees.
- Press your lower back gently into the floor and hold it there throughout.
- Slowly lower your right arm overhead while extending your left leg toward the floor, keeping both just above it.
- Return to the starting position and repeat on the opposite side.
Sets/Reps: 2 sets of 8 reps each side, daily
Modification: Keep one foot on the floor and slide the heel away from your body rather than lifting the leg.
4. Gentle Hip Abduction (Lying on Side)
Why it helps: The side-lying abduction activates the muscles that move your leg away from your centerline. These muscles contribute to pelvic stability during the single-leg phase of walking and reduce the amount of lateral sway that transfers stress to the hip joint. Starting this in Phase 1 without resistance builds the neural connection before the load arrives in Phase 2.
How to do it:
- Lie on your side with your bottom leg slightly bent for support.
- Keep your top leg straight, toes pointed slightly downward.
- Lift the top leg toward the ceiling without tilting your pelvis.
- Lower slowly to the start position.

Sets/Reps: 2 sets of 12 reps each side, daily
Modification: If lying on your side is uncomfortable, perform the movement standing with your back flat against a wall.
5. Quad Sets
Why it helps: This isometric contraction builds quadriceps strength without moving the hip at all. Strong quads reduce compressive forces at the knee and contribute to stable landing mechanics during the return-to-activity phases. It’s a low-effort way to maintain leg strength while hip irritation is at its peak.
How to do it:
- Sit or lie with your affected leg straight and a small rolled towel under the knee.
- Tighten your thigh muscle by pushing the back of your knee into the towel.
- Hold for 5 seconds, then relax fully.
- Repeat without rushing the release.
Sets/Reps: 2 sets of 10 reps, 2 to 3 times daily
Modification: Increase the hold duration to 8 to 10 seconds as strength improves.
Most regressions in hip labral tear recovery happen at the Phase 1 to Phase 2 transition. Phase 2 introduces resistance bands and standing exercises, a real increase from floor-based work. Before moving on, your pain should be consistently below 3 out of 10 across all Phase 1 exercises for at least three to four consecutive sessions.
If it isn’t, extend Phase 1 by another week. The timeline is a guide, not a deadline, and rushing this transition is the most common reason people return to Phase 1 weeks later.
Phase 2: The Mid Stage (Weeks 4-8) – Building Strength and Stability
Pain has settled enough to introduce resistance. Phase 2 moves the work from the floor to a more upright position, which is where hip strength transfers to daily activity. The focus shifts to lateral hip strength and pelvic stability during loaded movement. A light resistance band is required.
One thing worth knowing about Phase 2: the second and third weeks often feel harder than the first. Resistance bands recruit muscles that weren’t being challenged in Phase 1, and adaptation takes time.
Muscle soreness in the glutes and lateral hip is expected. Groin pain is not. If groin symptoms increase during Phase 2, reduce the band resistance before reducing the number of sets. Keeping the movement pattern intact matters more than maintaining the load.

6. Standing Hip Abduction (with Resistance Band)
Why it helps: Most people in Phase 1 don’t realize how much their hip is working during a normal walk. Every step involves a brief single-leg stance. During that fraction of a second, the gluteus medius is the only thing keeping the pelvis from dropping toward the opposite side.
The clamshells in Phase 1 woke that muscle up. This exercise asks it to work against resistance while upright, which is far closer to the actual demand it faces with every step.
How to do it:
- Stand with a resistance band looped around both ankles.
- Hold a wall or chair lightly for balance.
- Keep one foot planted and step the other leg out to the side against the band’s resistance.
- Control the return movement, don’t let the band snap back.

Sets/Reps: 2 sets of 15 reps each side, daily
Modification: Remove the band and perform the movement with bodyweight until the standing balance is stable.
7. Single-Leg Bridge (Progression from Phase 1)
Why it helps: The jump from two legs to one is bigger than it looks. In the double-leg bridge, both hips shared the load. Here, the glute of the planted leg holds the pelvis level entirely on its own. In the first set, most people find the affected side is noticeably weaker than they expected.
That asymmetry is worth noting rather than pushing past. The exercise is both training the deficit and measuring it. Moving into Phase 3 before both sides bridge with comparable stability is one of the more common reasons Phase 3 exercises produce symptoms they shouldn’t.
How to do it:
- Lie on your back with one knee bent and foot flat, the other leg extended straight.
- Squeeze the glute of the bent leg and lift your hips off the floor.
- Keep your pelvis level throughout. Don’t allow the hip of the extended leg to drop.
- Hold for 2 to 3 seconds, then lower under control.

Sets/Reps: 2 sets of 10 reps each side, daily
Modification: Keep both feet down and lift one foot just slightly off the floor to reduce the demand.
8. Side Plank with Hip Abduction
Why it helps: Holding a side plank forces the lateral hip and core to work simultaneously. Adding the abduction movement asks them to continue working while the hip moves, which is a closer approximation of real-life demands than any floor-based exercise.
How to do it:
- Lie on your side supported on one elbow, with your feet stacked and your body in a straight line.
- Lift your hips off the floor and hold the plank position.
- Raise your top leg slowly toward the ceiling while maintaining the plank.
- Lower the leg and repeat without dropping the hips.

Sets/Reps: 2 sets of 8 reps each side, 3 times per week
Modification: Perform the plank from your knees rather than your feet until the full version is stable.
9. Partial Squats / Box Squats
Why it helps: This is among the safer ways to introduce loaded knee flexion while controlling hip depth. Stopping at chair height keeps the hip above the angle where the anterior labrum is most at risk. The posterior chain, not the hip flexors, drives the movement.
How to do it:
- Stand in front of a chair or box with feet shoulder-width apart.
- Hinge slightly at the hip and bend your knees, lowering slowly until you lightly touch the seat.
- Press through your heels to stand back up without using the chair for support.
- Keep your chest upright and your knees tracking over your toes throughout.

Sets/Reps: 2 sets of 12 reps, 3 times per week
Modification: Use a higher surface (a kitchen counter stool) if the chair height provokes discomfort.
10. Bird-Dog
The bird-dog doesn’t fit neatly into a sets-and-reps prescription, which is why it tends to be underexplained. Start on your hands and knees with your wrists directly under your shoulders and your knees under your hips.
Extend your right arm forward and your left leg back simultaneously, keeping your spine absolutely neutral: no rotation at the hips, no arching at the low back, no dropping of the pelvis toward the lifted leg. Hold for 3 to 5 seconds. Return both limbs to the floor, then switch sides. Two sets of 8 repetitions each side, daily.
The exercise trains your core and hip extensors to resist unwanted movement rather than produce it. That’s a subtle distinction but an important one. If the movement produces any sensation in the groin on the affected side, reduce the range of the leg extension rather than abandoning the exercise entirely. A half-range bird-dog is still a productive bird-dog.
11. Monster Walks (with Resistance Band)
Why it helps: The band-resisted side step builds lateral hip strength during a moving pattern, which is closer to real-life demands than any stationary exercise. The external rotation component of the step also trains the hip’s rotational stability, which is a key factor in preventing the loading patterns that aggravate labral tears.
How to do it:
- Place a resistance band around both ankles.
- Stand with a slight knee bend and take small side steps, maintaining band tension throughout.
- Keep your knees from caving inward on each step.
- Complete 10 steps in each direction.

Sets/Reps: 2 sets of 10 steps each direction, 3 times per week
Modification: Use a lighter resistance band or take smaller steps to reduce demand.
Phase 3: The Late Stage (Weeks 9+) – Functional Movement and Return to Activity
Phase 3 moves the work into single-leg loaded patterns: the kind of strength that holds during the activities you actually want to return to. The exercises here require balance, posterior chain strength, and the ability to maintain pelvic control under increasing load. Light weights are introduced. This is also the phase where the return-to-running protocol begins, from walking intervals toward sustained effort over several weeks.
Most people notice something has changed in Phase 3 that doesn’t appear in a sets-and-reps log. The hip that felt unreliable for months starts to feel trustworthy again. When that happens, the temptation is to accelerate: to abandon the walk-run intervals and run continuously, to move to a heavier weight before the form is clean. The phase timeline exists precisely for that moment. Feeling ready and being structurally ready are not always the same thing.
Advanced progressions (week 12+):
- Plyometric exercises (with physical therapist approval)
- Sport-specific movement patterns
- Agility drills
- Return to running protocol: begin with 10-minute walk-run intervals, increase total running time by no more than 10% per week
12. Single-Leg Balance
Why it helps: After weeks of guarding a painful hip, the joint’s positional sense is often dimmed: not broken, but quieter than it should be. Single-leg balance work restores that signal.
It’s one of the less dramatic exercises in Phase 3, and often the most revealing. Patients who’ve been progressing smoothly sometimes find the 30-second unassisted hold harder than expected. That gap between perceived stability and actual stability is exactly what this exercise is measuring and closing.
How to do it:
- Stand on one leg with eyes open, arms relaxed at your sides.
- Hold for 30 seconds without significant sway.
- Progress to eyes closed, then to an unstable surface such as a folded towel or balance pad.
- Add arm movements or slow head turns to further challenge the system.

Sets/Reps: 3 sets of 30 seconds each leg, daily
Modification: Hold a wall with one finger for light support until the unassisted version becomes stable.
13. Reverse Lunges
Why it helps: The reverse lunge builds single-leg strength while keeping the hip in a less provocative position than the forward lunge. Stepping backward reduces the forward trunk lean and limits the degree of hip flexion on the front leg, which makes it the safer lunge variation throughout Phase 3.
How to do it:
- Stand tall with feet hip-width apart.
- Step one foot back and lower your back knee toward the floor.
- Keep most of your weight over the front foot throughout the movement.
- Push through the front heel to return to standing.

Sets/Reps: 2 sets of 10 reps each leg, 3 times per week
Modification: Hold a wall for balance, or reduce the depth of the step until confidence in the movement improves.
14. Single-Leg Romanian Deadlift (RDL)
Why it helps: The hip hinge pattern loaded on one leg trains the posterior chain for lifting, running, and any single-stance athletic activity. It’s one of the most functional exercises in this program. It’s also one of the most frequently performed incorrectly.
How to do it:
- Stand on one leg with a very slight bend in the knee.
- Hinge forward at the hip, allowing your torso and lifted leg to move in opposite directions until your torso is roughly parallel to the floor.
- Keep your spine neutral, your core braced, and the standing hip pointing straight forward throughout.
- Return to an upright position by driving the hip of the standing leg forward, not by pulling the torso up with the back.
Sets/Reps: 2 sets of 8 reps each leg, 3 times per week
Form note: The most common error as fatigue sets in is the standing hip rotating outward, causing the pelvis to drop and turn toward the reaching side. When that happens, the exercise stops training what it’s designed to train and begins loading the lateral hip in a way that can aggravate an anterior labral tear. End the set when form breaks, not when reps run out.
Modification: Keep the toes of the lifted foot lightly touching the floor until the single-leg version becomes stable. Add a light weight (a water bottle, then a small dumbbell) only when bodyweight form is clean for several sessions.
15. Light Kettlebell Goblet Squat (to a High Box)
Why it helps: The goblet squat with a controlled depth target allows the squat pattern to be loaded for the first time in the program, with the high box preventing the hip from reaching the range where the labrum is most stressed. Holding a weight at chest height shifts the center of mass forward slightly, which makes it easier to keep the torso upright and reduces the hip flexion required to reach depth.
How to do it:
- Hold a light kettlebell or dumbbell at chest height with both hands.
- Stand with feet slightly wider than hip-width, toes angled slightly outward.
- Squat down until you lightly contact a high box or chair seat, keeping your chest upright.
- Drive through your heels to return to standing.
Sets/Reps: 2 sets of 10 reps, 3 times per week
Modification: Start without weight and add resistance only after several pain-free sessions at bodyweight.
Warning Signs: When to Seek Immediate Help
Contact your healthcare provider immediately if you experience any of the following during or after exercise.
A physical therapist can provide a level of assessment and adjustment that a written guide cannot. They can identify the specific movement patterns contributing to your pain, provide hands-on treatment to improve joint mobility, and modify the program based on how your hip responds week to week. If pain persists or returns after a period of improvement, that’s the signal to seek an in-person evaluation rather than continuing to adjust the program independently.
Conclusion
Recovery from a hip labral tear is a load management problem. The tear creates a structure that tolerates less than it once did. The exercises in this program gradually rebuild the capacity of the surrounding musculature until the damaged labrum is no longer the limiting factor in the kinetic chain. That process takes longer than most people expect, and the Phase 1 to Phase 2 transition is where patience matters most.
The patients who do best typically discover something worth keeping: a gluteus medius that actually works, a core that stabilizes instead of bracing, a hip that moves with more control than it had before the injury. Most people never need to consider surgery. If six months of consistent conservative care doesn’t produce adequate relief, a consultation with an orthopedic specialist is the right next step. Modern arthroscopic techniques produce good outcomes for the right candidates.
FAQs
How long does a hip labral tear take to heal with exercises?
Recovery timelines reflect the severity of the tear and the consistency of rehabilitation, not a fixed biological clock. General clinical guidance suggests:
These ranges represent typical outcomes, not guarantees. Underlying hip anatomy (the presence of FAI or dysplasia), prior injury history, and activity level all influence how recovery proceeds. A physical therapist can give you a more accurate picture based on your specific presentation.
Is walking bad for a torn hip labrum?
Walking is generally safe from Phase 1 onward, provided it doesn’t produce sharp groin pain. The Cleveland Clinic notes that many people with hip labral tears can walk without significant discomfort. Flat surfaces, a comfortable pace, and shorter distances are the right starting parameters. Avoid hills, uneven ground, and distances long enough to produce a pain flare. If walking consistently generates discomfort lasting more than an hour after you stop, reduce the distance rather than the speed.
Can a hip labral tear heal naturally?
The labral cartilage itself doesn’t regenerate, so the structural tear won’t resolve the way a muscle strain does over a few weeks. What conservative rehabilitation does is different: it builds sufficient muscular support around the hip that the damaged labrum carries less load, reducing pain and restoring function. Many people manage symptoms effectively without surgery. Whether that will be true for you depends on the tear’s size, location, and whether there’s an underlying structural issue (like FAI or dysplasia) driving the symptoms.
Will I need surgery for my hip labral tear?
Surgical intervention is typically considered when:
- Conservative treatment hasn’t provided adequate relief after 3 to 6 months
- Mechanical symptoms (locking, catching) persist despite rehabilitation
- Significant functional limitations remain that affect quality of life
- Imaging shows a large, unstable tear alongside a structural hip abnormality
A 2022 study in Knee Surgery, Sports Traumatology, Arthroscopy tracking patients with pre-arthritic hip pain found that roughly half avoided surgery at a one-year follow-up. Outcomes were shaped most strongly by whether FAI was present: patients with a confirmed FAI diagnosis were more than three times more likely to progress to surgery than those without. The decision is best made with an orthopedic specialist who can assess your specific anatomy and how your hip has responded to conservative care.
What are the best stretches for a hip labral tear?
Gentle mobility work is more appropriate than deep static stretching in the early phases. Aggressive hip flexor stretching that takes the hip past 90 degrees of flexion can aggravate the anterior labrum. Focus on gentle range-of-motion movements: piriformis stretches in the supine figure-4 position, gentle hip circles in a pain-free range, and a hip flexor stretch no deeper than 90 degrees of flexion. Keep each stretch to 30 seconds.
Physical therapist opinion on early stretching for labral tears is not unanimous. Some practitioners prioritize strength work exclusively in Phase 1 and Phase 2 and reserve stretching for when the hip is less irritated. If gentle circles or the figure-4 consistently increase groin symptoms in the hours after you do them, hold off on stretching and focus on the activation exercises instead.
What activities can I do for cardio with a hip labral tear?
Swimming (avoiding the butterfly stroke), stationary cycling with a high seat position, and walking are appropriate from Phase 1 onward. The elliptical trainer and rowing machine become viable in Phase 2 with modifications. Running waits until Phase 3 and follows a structured return-to-run protocol beginning with walk-run intervals.

