Why Exercise Is Important for People With Breast Cancer, and the Best Workouts to Do

When you hear “exercise” and “breast cancer” in the same sentence, your brain may respond with:
“Respectfully… no.” Between appointments, side effects, and the emotional roller coaster, adding
workouts can feel like trying to juggle flaming marshmallows. But here’s the surprising truth: movement is one
of the most practical tools you can use during and after breast cancer treatmentbecause it helps your body do
the hard stuff it’s already doing.

Exercise won’t replace medical treatment (your oncology team still gets the starring role), but it can reduce
fatigue, help rebuild strength, improve mood and sleep, support heart and bone health, and make day-to-day life
feel more doable. The key is choosing the right kind of movement for your treatment phase,
your symptoms, and your energy levelbecause “best workouts” doesn’t mean “hardest workouts.” It means
smart, safe, and sustainable.

Why exercise matters for breast cancer (the science, in real-life terms)

1) It helps with cancer-related fatigue (yes, moving can actually create energy)

Cancer fatigue is not the same as “I stayed up late scrolling.” It can feel heavy, persistent, and unfair.
The twist: research-backed guidelines consistently show that appropriate exercise can reduce cancer-related
fatigue during and after treatment. This doesn’t mean sprinting; it can be gentle walking, light strength
training, or short movement “snacks” spread across the day.

Think of it like jump-starting a car: you don’t floor it immediatelyyou connect the cables, turn the key,
and let the engine come back online. Movement helps your body regain stamina over time.

2) It supports your heart and lungs (especially important with certain treatments)

Some breast cancer treatments can affect cardiovascular fitness. Regular aerobic activitylike walking,
cycling, or swimminghelps maintain heart and lung function. This matters for everyday life (stairs, errands,
carrying groceries) and for long-term health.

3) It helps rebuild strength, mobility, and confidence after surgery

After surgery, it’s common to have tightness or reduced range of motion in the shoulder and chest area.
Carefully progressed mobility and strengtheningoften guided by a physical therapistcan help you return to
comfortable movement. The goal isn’t to “push through pain.” The goal is to restore function gradually.

4) It can reduce anxiety and improve mood (because your nervous system deserves a break)

A diagnosis can change your brain’s “default setting” to alert mode. Exercise supports mental health by
reducing stress, improving sleep, and providing a sense of controlespecially when so many things can feel
out of your hands.

5) It helps with bone health and body composition

Breast cancer treatment and hormonal changes can influence bone density and muscle mass. Strength training and
weight-bearing movement help maintain muscle and support bone health. This isn’t about aesthetics; it’s about
staying steady on your feet, reducing fall risk, and supporting long-term independence.

6) It may be linked with better outcomes (with an important asterisk)

Many studies show that people who are physically active before and after diagnosis often have lower risk of
recurrence and improved survival. Important asterisk: these findings are usually observational, meaning they
show association, not a guaranteed cause-and-effect promise. Still, the pattern is strong enough that major
cancer organizations encourage movement as part of survivorship and supportive care.

Safety first: how to exercise smart during breast cancer

Exercise is generally safe for most people with cancer, but your plan should match your treatment and current
symptoms. Before starting or changing your routine, check in with your oncology teamespecially if you have
surgery recovery limitations, severe fatigue, bone concerns, anemia, neuropathy, or other complications.

Red flags: pause the workout and contact your care team

• Fever, chills, or signs of infection
• Chest pain, fainting, or unusual shortness of breath
• Dizziness that doesn’t settle with rest
• Sudden swelling, heaviness, or pain in an arm (especially on the surgical side)
• New or worsening bone pain
• Uncontrolled nausea, vomiting, or diarrhea

What about lymphedema and strength training?

For years, many people were told to avoid lifting with the affected arm. But well-known clinical trials have
found that slowly progressive strength training (starting light, increasing gradually, and
paying attention to symptoms) does not necessarily increase lymphedema risk and may improve function for many
survivors. If you have or are at risk for lymphedema, the safest move is to work with a lymphedema-trained
clinician or physical therapist who can guide progression and compression strategies when appropriate.

The best workouts for people with breast cancer (by type)

1) Walking (the undefeated champion)

Walking is accessible, adaptable, and doesn’t require special equipmentunless you count shoes that don’t
betray you mid-stride. You can walk outside, on a treadmill, in a hallway, or even do short loops around the
living room during commercials.

• Best for: fatigue, mood, cardiovascular health, daily function
• Starter plan: 5–10 minutes at an easy pace, 3–5 days/week
• Progression: add 1–2 minutes every few sessions

2) Low-impact cardio: cycling, swimming, water aerobics, or elliptical

If joints ache or your energy is limited, low-impact cardio can be gentler than running. Water workouts can
feel especially good for stiffness and can make movement easier.

• Best for: joint comfort, stamina, heart health
• Try: stationary bike intervals like 2 minutes easy / 1 minute slightly faster, repeated 5 times

3) Strength training (aka “bone and muscle savings account”)

Strength training helps maintain muscle, supports bone health, improves posture, and makes daily activities
easier (lifting laundry baskets counts as functional strength training, but we can make it less dramatic).
The secret sauce is starting light and focusing on good form.

Simple, beginner-friendly strength moves:

• Sit-to-stand from a chair (legs + core)
• Wall push-ups or countertop push-ups (chest + arms)
• Seated or standing rows with a resistance band (upper back)
• Glute bridges (hips + core)
• Farmer carry with light weights (grip + posture)

Aim for 1–2 sets of 8–12 reps for a few exercises, 2 days/week to start. If you’re in active treatment, it’s
fine to use lighter resistance and fewer sets. Consistency beats intensity.

4) Mobility and stretching (especially after surgery)

Gentle mobility can reduce stiffness and help restore shoulder range of motion after surgery. This is where a
physical therapist can be a game-changer, especially if you’ve had lymph node removal, reconstruction, or
significant tightness.

• Shoulder rolls and scapular squeezes
• Wall “walk” with fingers (as tolerated)
• Doorway chest stretch (gentle, not aggressive)
• Neck and upper-back mobility

5) Yoga, Pilates, and tai chi (mind-body meets joint-friendly strength)

Mind-body workouts can improve flexibility, balance, and stress levels. They can also help you reconnect with
your body in a way that feels supportive rather than punishing. Choose beginner options and skip any poses
that strain surgical areas or ports.

6) Balance training (for neuropathy, stability, and confidence)

Neuropathy (numbness/tingling) can make balance tricky. Simple balance drills help reduce fall risk:

• Heel-to-toe walk along a counter (light hand support)
• Single-leg stand near a sturdy surface (10–20 seconds each side)
• Standing march (slow and controlled)

How much exercise should you do? A practical target

Many health and cancer organizations align around a long-term goal of about
150 minutes/week of moderate-intensity activity plus
2 days/week of strength training. But if you’re starting from zeroor you’re in treatment
your real goal is: do what you can, then build gradually.

The “talk test” for intensity

• Moderate intensity: you can talk, but singing would be… ambitious.
• Vigorous intensity: you can say a few words, but you’re not narrating your life story.

Best workouts by treatment phase

During chemotherapy or radiation: “minimum effective dose” movement

The best plan during active treatment is flexible. Side effects can change week to week (and sometimes hour
to hour). The goal is to reduce deconditioning without draining your battery.

• Best choices: short walks, gentle cycling, light strength, mobility work
• Try: 10 minutes walking + 5 minutes stretching on “better” days
• On rough days: 2–5 minute movement snacks (walk to the mailbox, gentle hallway laps)

After surgery: rebuild range of motion and strength in stages

Follow your surgeon’s and physical therapist’s guidance on timing and restrictions. Early on, mobility and
gentle shoulder work may be the priority. Strength training typically comes later, progressed slowly.

Endocrine therapy and survivorship: build the long-term routine

If you’re on endocrine therapy, joint stiffness and fatigue can be challenges. A mix of aerobic activity,
strength training, and mobility work often helps. This is a good phase to steadily work toward guideline-level
activity.

A sample week of breast cancer-friendly workouts (adjust as needed)

Option A: Beginner or in active treatment

• Mon: 10–15 min walk + gentle stretching
• Tue: Strength (20 min): sit-to-stand, wall push-ups, band rows, glute bridges
• Wed: Rest or 5–10 min easy walk
• Thu: 10–20 min low-impact cardio (bike or walk)
• Fri: Mobility + balance (10–15 min)
• Sat: Strength (repeat Tuesday, keep it light)
• Sun: Rest, or a relaxed stroll

Option B: Building toward guidelines (post-treatment or stable symptoms)

• 3–5 days/week: 20–40 min moderate cardio (walk, bike, swim)
• 2 days/week: Full-body strength training (30–40 min)
• Most days: 5–10 min mobility (especially shoulders, chest, upper back)

Tips to make exercise actually happen (without turning it into a personality trait)

• Anchor it to something you already do: walk after breakfast, stretch after brushing teeth.
• Use the “two-song rule”: if you can do two songs’ worth of movement, you’ve shown up.
• Keep a backup plan: when you can’t do your usual routine, do 5 minutes of something.
• Track wins, not perfection: checkmarks on a calendar beat guilt spirals every time.
• Ask about cancer rehab: oncology physical therapy can personalize your plan safely.

500+ words of real-world experiences (the stuff people don’t always say out loud)

Everyone’s breast cancer journey is different, but certain exercise-related experiences come up again and again
in survivorship communities and clinic conversations. The stories below are composite examples
based on common patterns patients reportshared here so you feel less alone and more prepared.

The “I used to be active… and now walking to the kitchen feels like a triathlon” phase:
Many people are shocked by how quickly stamina changes during treatment. One week you’re running errands; the
next, you’re winded by a shower. A common turning point is learning to treat movement like a dial instead of a
switch. Instead of “work out or don’t,” it becomes “how much can I safely do today?” For some, that’s a
12-minute slow walk. For others, it’s two laps around the living room with a rest break. The win isn’t the
distanceit’s keeping the habit alive so your body doesn’t have to start from scratch later.

The “good day / bad day” reality check:
People often describe a tug-of-war between wanting structure and needing flexibility. A plan helpsuntil your
body changes the schedule without asking. Many find success with a menu approach: a “green” workout (more
energy), a “yellow” workout (moderate fatigue), and a “red” workout (very low energy). On red days, the goal
might be gentle stretching, diaphragmatic breathing, or a slow five-minute walk. This mindset reduces the
emotional crash of “I failed today” and replaces it with “I adapted today.”

The lymphedema fear (and the relief of a clear plan):
A lot of people avoid using their affected arm because they’re scared of swelling or making lymphedema worse.
That fear makes senseand it can be paralyzing. Many feel better once they learn that slow, progressive
strengthening can be safe for many survivors when guided properly. People often describe a confidence boost
from learning what “start light and progress gradually” really means: tiny dumbbells, resistance bands, careful
monitoring, and a clinician who can say, “This is normal muscle soreness” versus “Let’s evaluate this swelling.”
Over time, using the arm again can feel like getting a piece of your life back.

The mood shift that sneaks up on you:
Even when exercise doesn’t feel fun, people often report that movement changes their mental weather. A short
walk can turn the volume down on anxiety. Light strength training can restore a sense of capability. Yoga can
create a rare moment where the body feels like a teammate rather than a problem to solve. The most common
theme is that exercise becomes less about “fitness” and more about “coping.” It’s a tool for getting through
the day, sleeping a little better, and feeling grounded.

The “new normal” that’s still meaningful:
Many survivors say they eventually stop chasing the exact pre-diagnosis routine and build a new one that fits
who they are now. Some become devoted walkers. Some fall in love with strength training because it feels
empowering. Others prefer water aerobics, tai chi, or dancing in their kitchen. A surprisingly common
experience is realizing that a sustainable routine can be simpler than expected: consistent walking, two days
of basic strength work, and a little mobility most days. Not flashy. Not complicated. Just reliablelike a
good friend who shows up.

Bottom line

Exercise is important for people with breast cancer because it supports your body through treatment,
helps manage side effects like fatigue, improves strength and function, and can make daily life feel more
manageable. The best workouts are the ones you can do safely and consistently: walking, low-impact cardio,
gentle mobility, progressive strength training, and mind-body movement. Start where you are, progress slowly,
and let your care team help you tailor the planbecause the goal isn’t to “crush” workouts. The goal is to
support your recovery and your life.