Why Walking Is True Cardio: How a Brisk Step Builds Heart and Metabolic Health

Table of Contents

1. Key Highlights:
2. Introduction
3. What Counts as Cardiovascular Exercise — and Where Walking Fits
4. How to Gauge Intensity: The Talk Test, Heart Rate, and Perceived Exertion
5. The Physiology of Walking: What Happens in the Heart and Muscles
6. Walking Versus Other Aerobic Activities: Strengths and Trade-Offs
7. How to Make Walking a More Potent Cardio Stimulus
8. Tracking Progress: Steps, Minutes, Pace, and Physiological Markers
9. Concrete Walking Programs: Beginner, Intermediate, and Performance-Oriented Plans
10. Real-World Examples: How Walking Fits Into Everyday Life
11. Tools, Gear, and Environmental Considerations
12. Walking for Special Populations: Older Adults, People with Chronic Conditions, and Postpartum Individuals
13. Common Mistakes and How to Avoid Them
14. Evidence Snapshot: Health Outcomes Linked to Regular Walking
15. Designing Long-Term Walking Habits: Consistency, Variety, and Motivation
16. Sample Weekly Plans (Practical Templates to Start Next Week)
17. Safety Checklist Before You Start
18. Measuring Success Beyond the Scale
19. Common Questions About Walking Intensity and Results
20. FAQ

Key Highlights:

• Brisk walking performed at moderate intensity elevates heart rate and respiration enough to qualify as cardiovascular exercise, delivering measurable benefits for heart health, blood pressure, blood sugar control, and mood.
• Intensity, duration, and progression matter: use the talk test, heart-rate targets, or perceived exertion to ensure walks are cardio-effective; adding intervals, inclines, poles, or light resistance accelerates gains.
• Walking is low impact, accessible across ages and fitness levels, and—when programmed deliberately—can match many benefits typically associated with higher-impact cardio like running.

Introduction

Walking carries a reputation for being ordinary: a practical way to move from place to place, a convenient break between meetings, a gentle pastime for retirees. That reputation misses the point. Walked with purpose and structure, walking becomes a direct intervention for cardiovascular health. It strengthens the heart, improves circulation and metabolic control, and produces measurable reductions in disease risk without the injury profile of higher-impact sports.

This article translates physiology and practical experience into a usable blueprint. It explains how walking functions as cardio, how to measure and raise intensity, how walking stacks up against other aerobic activities, and how to build progressive walking programs that deliver real improvements in fitness and health. Expect practical session templates, safety and equipment advice, and guidance for specific populations such as beginners, older adults, and people managing chronic conditions.

What Counts as Cardiovascular Exercise — and Where Walking Fits

Cardiovascular (aerobic) exercise is any sustained activity that raises heart rate and respiration sufficiently to challenge the heart and lungs. The purpose is to increase cardiac output during exercise and elicit adaptations over time: higher stroke volume, improved endothelial function, greater capillary density in muscle, and mitochondrial changes that raise the body’s ability to use oxygen.

Walking occupies a range from sedentary ambulation to deliberate aerobic work. A gentle stroll through a shopping mall or a short, unhurried walk around the block primarily supports joint mobility and mental well-being; it produces limited cardiovascular strain. Brisk walking—often described as walking fast enough that conversation becomes somewhat labored—lands squarely in the moderate-intensity aerobic category. Sustained brisk walking performed regularly leads to the same class of adaptations targeted by other moderate activities such as recreational cycling, water aerobics, or playing doubles tennis.

Key metrics that determine whether a walking session qualifies as cardio:

• Intensity: Heart rate and breathing are elevated. Moderate intensity typically corresponds to about 50–70% of maximum heart rate.
• Duration: Sessions of 20–60 minutes provide substantial stimulus when performed several times per week.
• Frequency: Consistent practice across most days of the week accumulates cardiovascular benefit.

Public health guidance aligns with this framing: 150–300 minutes per week of moderate-intensity aerobic activity or 75–150 minutes per week of vigorous-intensity activity delivers substantial health benefits. Brisk walking is a practical way to meet these targets for large segments of the population.

How to Gauge Intensity: The Talk Test, Heart Rate, and Perceived Exertion

Measuring intensity ensures that walking produces cardiovascular strain rather than just movement. Three practical tools work across environments and fitness levels.

1. The talk test

• Moderate intensity: You can speak in sentences, but carrying on a long, comfortable conversation is difficult. Breathing is heavier but controlled.
• Vigorous intensity: Speaking requires pauses for breath—only short phrases are possible.

The talk test is simple and reliable for everyday use. It requires no device and translates well to different ages and fitness backgrounds.

2. Heart-rate targets

• Estimate maximum heart rate (HRmax) roughly as 220 minus age. Use this cautiously; individual variability exists.
• Moderate intensity targets ~50–70% of HRmax. Vigorous intensity ~70–85% of HRmax.
• The Karvonen method (heart-rate reserve) refines targeting by factoring resting heart rate, producing individualized training zones.

Wearing a heart-rate monitor or smartwatch makes it easy to stay within the prescribed zone. For example, a 50-year-old aiming for moderate intensity would target roughly 85–119 beats per minute (50–70% of an estimated HRmax of 170). Individual fitness, medications, and conditions can change heart-rate responses, so adjust accordingly.

3. Rating of perceived exertion (RPE)

• A 6–20 Borg scale maps perception to effort; moderate intensity approximates 12–14, vigorous 15–17.
• RPE is useful when heart-rate monitors aren’t available or when heart-rate responses are atypical (e.g., beta-blocker use).

Combine methods for most accurate control: use the talk test as a baseline, cross-check with heart rate when possible, and confirm with RPE.

The Physiology of Walking: What Happens in the Heart and Muscles

Walking applies steady mechanical loading to large muscle groups—primarily the gluteals, quadriceps, hamstrings, calves, and various stabilizers. Repeated moderate-intensity sessions produce both central (cardiac) and peripheral (muscular, vascular) adaptations.

Cardiac changes

• Stroke volume increases as the heart adapts, pushing more blood per beat. Over time, resting heart rate tends to fall and the heart becomes more efficient during submaximal efforts.
• Consistent aerobic work improves endothelial function—the ability of blood vessels to dilate—lowering vascular resistance.

Peripheral and metabolic changes

• Capillary density in skeletal muscle increases, improving oxygen and nutrient delivery.
• Mitochondrial enzyme activity rises, enhancing oxidative metabolism and endurance.
• Glucose uptake into muscle improves, raising insulin sensitivity and assisting blood-sugar control.

Inflammation and lipid profile

• Walking reduces markers of chronic inflammation and contributes to favorable changes in cholesterol fractions. These shifts lower cardiovascular risk beyond the direct effects on blood pressure and heart function.

Even modest elevations in cardiorespiratory fitness lower all-cause mortality risk. Those gains are attainable through regular, purposeful walking.

Walking Versus Other Aerobic Activities: Strengths and Trade-Offs

Walking compares favorably to higher-impact cardio in several ways while differing in certain magnitudes of effect.

Strengths

• Low impact: Walking imposes less mechanical stress on joints than running or plyometrics, making it safer for people with osteoarthritis or joint concerns.
• Accessibility: No specialized equipment or training required. Walking adapts to an individual’s schedule and environment.
• Sustainability: People often maintain walking programs longer than high-intensity regimens that trigger injury or burnout.

Trade-offs

• Calorie burn per minute is generally lower than running or intense cycling at the same duration. To match the caloric expenditure of running, walkers extend duration, add intensity through incline or intervals, or carry light resistance.
• Gains in maximal aerobic capacity (VO2max) tend to be smaller with walking at moderate intensity than with structured high-intensity interval training. However, for most people, walking-induced improvements are clinically meaningful—especially when the alternative is inactivity.

A pragmatic approach blends approaches: use walking as primary, then incorporate targeted higher-intensity or cross-training sessions for those seeking faster VO2max increases or time-efficient workouts.

How to Make Walking a More Potent Cardio Stimulus

Intensity and variability transform walking from a movement habit into a cardiovascular training tool. Use progressive overload principles: increase duration, frequency, or intensity gradually to avoid injury while maintaining stimulus.

Effective strategies

• Brisk pacing: Aim for a pace that elevates heart rate into the moderate zone. For many adults this corresponds to roughly 3–4 miles per hour, depending on fitness and terrain.
• Intervals: Alternate 1–3 minutes of faster walking (near vigorous intensity) with equal or longer recovery at an easy pace. A classic example: 10–15 minutes warm-up, 8–12 cycles of 1 minute fast / 1 minute easy, 5–10 minutes cool-down.
• Hill work and inclines: Uphill walking increases muscular demand and heart rate without increasing cadence. Use treadmill incline or natural hills to stress the cardiorespiratory system.
• Weighted vests and hand weights: Small amounts of external load (start light) increase metabolic cost. Avoid heavy or awkward loads that alter gait or spine alignment.
• Nordic walking poles: Engages upper body musculature, raising oxygen consumption and heart rate while stabilizing posture.
• Cadence and stride: Slightly increasing step length and cadence (while maintaining good form) raises intensity.
• Time-under-tension: Longer continuous sessions (45–90 minutes) at moderate intensity improve endurance and metabolic adaptations.

Progression rules

• Increase only one training variable at a time—duration, intensity, or frequency.
• Follow the 10% rule: increase total walking time or distance by no more than roughly 10% per week to reduce injury risk.
• Schedule at least one recovery day per week. Even low-intensity walks can be active recovery.

Sample session templates appear later in this article to help you apply these principles immediately.

Tracking Progress: Steps, Minutes, Pace, and Physiological Markers

Tracking transforms activity into measurable progress. Choose metrics that align with goals.

Common metrics

• Steps: A daily target (7,000–10,000 steps) provides a simple baseline for general health. Progressive step goals encourage consistent movement.
• Minutes of moderate activity per week: Aligns with public health targets (150–300 minutes).
• Distance and pace: GPS watches or smartphone apps provide pace in minutes per mile/kilometer. Brisk walking pace typically ranges from 15–20 minutes per mile (9–12 minutes per kilometer) depending on fitness.
• Heart rate: Time spent in target heart-rate zones quantifies cardio stimulus.
• Subjective markers: RPE and talk test validate that effort is in the aerobic range.
• Functional measures: Resting heart rate, timed walking tests (e.g., 6-minute walk), and recovery heart-rate decline post-exercise provide real-world indicators of improvement.

Longitudinal tracking should show gradual upward trends: longer durations at the same perceived effort, faster pace for the same distance, lower resting heart rate, and faster recovery heart rate after exertion.

Concrete Walking Programs: Beginner, Intermediate, and Performance-Oriented Plans

Below are progressive, practical programs for different starting points. Each plan assumes basic medical clearance for exercise if chronic conditions or symptoms are present.

Beginner program (8 weeks) — Goal: Build consistency and reach 30 minutes of brisk walking most days

• Weeks 1–2: 20–25 minutes total, 5-minute warm-up (easy pace), 10–15 minutes brisk, 5-minute cooldown. 4–5 days per week.
• Weeks 3–4: 25–35 minutes total. Add one day with short intervals—30 seconds fast / 90 seconds easy, repeat 6–8 times.
• Weeks 5–8: Increase to 30–45 minutes brisk 4–5 days/week. Introduce one hill or incline day per week (10–20 minutes of rolling hills within session).

Intermediate program (12 weeks) — Goal: Improve aerobic fitness and manage weight

• Base: 4–5 brisk walks per week, 30–50 minutes each.
• Two sessions per week: interval session (after warm-up, 6–10 repeats of 1–2 minute fast / 1–2 minute easy).
• One session per week: long steady-state walk 60–90 minutes at moderate intensity.
• One session: hill repeats or treadmill incline intervals (3–6 repeats of 3–5 minutes uphill, easy downhill recovery).
• Strength-conditioning: add two 20–30 minute resistance-training sessions per week for muscular support and injury prevention.

Performance-oriented plan (for time-efficient cardio gains)

• Maintain 3–5 brisk walking sessions per week.
• One high-intensity interval walking session: short, near-vigorous efforts (30–60 seconds) with short recovery (30–90 seconds).
• One long walk 60+ minutes to develop endurance and fat oxidation.
• Two sessions of cross-training (cycling, rowing) to increase peak aerobic stimulus while reducing repetitive load on the legs.

Safety and intensity adjustments

• Individuals on heart-rate-lowering medications (e.g., beta blockers) should rely more on RPE and the talk test.
• Older adults or those with joint pain should prioritize incline work over extra cadence to limit impact.
• For weight-loss-focused programs, increase overall weekly duration and pair walking with basic strength work and dietary adjustments.

Real-World Examples: How Walking Fits Into Everyday Life

Case 1: A busy professional builds cardio without changing commuting patterns

• Strategy: Walk at a brisk pace for 30 minutes in the morning and a 15-minute power walk at lunch. Use a smartwatch to track heart rate and ensure brisk intensity.
• Outcome: After 12 weeks, resting heart rate decreases by several beats per minute, midday energy improves, and the worker meets weekly moderate activity goals without losing commute time.

Case 2: An older adult with knee osteoarthritis returns to activity

• Strategy: Begin with short, frequent walks (3–4 times daily for 10–15 minutes), progress to single 30-minute brisk walks, and add poles for extra stability and upper-body engagement.
• Outcome: Pain decreases with regular movement, gait stability improves, and blood pressure drops modestly. Walking avoids the high-impact stress of running while delivering cardiovascular benefit.

Case 3: Weight-loss regimen with hiking and incline treadmill work

• Strategy: Combine three 45–60 minute brisk walks (including one hard-hill session) with weekend hikes. Use a weighted vest sparingly for select sessions.
• Outcome: Increased caloric expenditure, improved muscular endurance, and reduced visceral fat over months; blood glucose markers improve.

These examples illustrate how walking adapts to schedules, physical limitations, and goals.

Tools, Gear, and Environmental Considerations

Minimal equipment is required to reap walking’s cardiovascular benefits; thoughtful gear improves comfort, safety, and performance.

Footwear

• Choose shoes with adequate cushioning and support for your foot type and gait. Replace shoes every 300–500 miles or when they show visible wear.
• For longer sessions or rough terrain, trail-specific shoes offer more stability and traction.

Clothing and accessories

• Moisture-wicking layers, sun protection, and weather-appropriate outerwear extend comfort and reduce risk.
• Reflective gear and lights are essential for early-morning or evening walks in low-light conditions.

Tracking devices

• Pedometers and phone apps track steps and distance. Heart-rate monitors and GPS watches provide pace and intensity data.
• Use devices as tools; they should inform training decisions, not replace bodily feedback.

Poles and vests

• Nordic walking poles engage the upper body and boost heart-rate response without adding joint stress.
• Weighted vests increase intensity—start very light (2–5% of body weight) and progress cautiously.

Environmental choices

• Sidewalks, parks, and trails each influence intensity and joint impact. Incline and varied terrain increase muscular and cardiovascular challenge.
• Air quality matters: avoid heavily polluted routes, especially for long or high-intensity sessions.

Hydration, fueling, and timing

• For sessions under one hour, water is typically sufficient. For longer walks, include a small carbohydrate source.
• Time walks to match energy patterns: morning activity can improve mood and metabolic markers; midday or evening walks help manage postprandial blood sugar.

Walking for Special Populations: Older Adults, People with Chronic Conditions, and Postpartum Individuals

Walking’s accessibility makes it especially valuable for groups that benefit from low-risk, high-value activity. Tailor intensity and progression to individual health status.

Older adults

• Focus on balance, strength, and progressive aerobic work. Poles improve stability and increase cardiovascular load safely.
• Supervised programs that include strength training reduce fall risk and amplify mobility gains.

People with type 2 diabetes

• Post-meal walks, even brief 10–15 minute sessions, blunt postprandial glucose spikes and improve glycemic control.
• Regular brisk walking reduces insulin resistance and lowers HbA1c when combined with diet changes.

Cardiovascular disease and hypertension

• Walking lowers resting blood pressure and improves endothelial function. Cardiac rehabilitation programs often include structured walking as a core component.
• Medical clearance and individualized target heart-rate zones are essential for people with diagnosed heart disease.

Postpartum women

• Begin with gentle walking soon after delivery when medically cleared, gradually increasing duration and intensity.
• Core and pelvic-floor rehabilitation combined with progressive walking reduces the risk of pelvic dysfunction and supports return to fitness.

Chronic pain and arthritis

• Walking reduces pain through improved joint lubrication and muscle support. Short, frequent walks with gradual progression are preferable to long, infrequent sessions that exacerbate symptoms.

Always obtain medical clearance when there’s uncertainty about safety.

Common Mistakes and How to Avoid Them

Walking seems simple, yet common mistakes limit benefit or raise injury risk.

Mistake: Walking but never progressing intensity

• Fix: Apply progressive overload—add minutes, increase pace, include intervals or inclines.

Mistake: Relying solely on steps

• Fix: Pair step goals with intensity metrics (RPE, talk test, heart rate). Ten thousand steps at a very slow pace will not produce the same cardiovascular return as 30–60 minutes brisk walking.

Mistake: Overuse injuries from sudden jumps in volume

• Fix: Increase volume gradually. Respect recovery and include strength training to support joints and posture.

Mistake: Poor biomechanics and posture

• Fix: Maintain an upright trunk, slight forward lean from the ankles, relaxed shoulders, and an engaged core. Heel-to-toe roll helps efficient propulsion.

Mistake: Ignoring weather and safety

• Fix: Plan routes with shade, water, and safe crossings. When heat, cold, or pollution present risks, modify time, duration, or location.

Recognizing and correcting these mistakes keeps walking productive and sustainable.

Evidence Snapshot: Health Outcomes Linked to Regular Walking

Large observational studies and randomized trials converge on walking’s benefits for population health.

• Mortality and chronic disease risk: Cohort data show consistent associations between regular walking and lower all-cause mortality, reduced cardiovascular disease incidence, and lower risk of type 2 diabetes. Gains accrue across intensity and duration; brisk walking tends to yield stronger associations.
• Blood pressure and lipids: Randomized trials and systematic reviews show modest but meaningful reductions in systolic and diastolic blood pressure and improved lipid profiles with regular aerobic walking programs.
• Glycemic control: Short, regular post-meal walks reduce postprandial glucose excursions and, over time, contribute to improved insulin sensitivity.
• Mental health: Walking reduces symptoms of mild-to-moderate depression and anxiety, likely through combined physiological, social, and environmental mechanisms.

These findings translate into public health recommendations that place walking at the center of primary prevention strategies.

Designing Long-Term Walking Habits: Consistency, Variety, and Motivation

A plan that yields cardiovascular gains depends on adherence. Build habits that fit life rather than forcing life to fit the workout.

Habit-building tactics

• Anchor walks to existing routines: walk immediately after breakfast or during a commute break.
• Use micro-goals: commit to short daily sessions that build into longer ones over weeks.
• Social accountability: walking with a partner or group increases adherence. Corporate walking challenges and Meetup groups provide community and motivation.
• Make it enjoyable: choose varied routes, listen to podcasts or music, and alternate scenic outdoor walks with treadmill sessions when weather dictates.

Variety reduces boredom and increases the range of physical stimulus: mix steady-state endurance walks with interval and hill sessions, add strength training twice weekly, and use cross-training to protect joints.

Sample Weekly Plans (Practical Templates to Start Next Week)

Template A — Time-efficient cardio (three days)

• Day 1: Interval walk — 10-minute warm-up, 20 minutes of alternating 1 minute fast / 1 minute easy, 5-minute cooldown.
• Day 2: Cross-train (bike or swim) 30–45 minutes at moderate intensity.
• Day 3: Long steady walk 45–60 minutes at moderate intensity.
• Optional: two 20–30 minute easy walks for activity accumulation.

Template B — Daily movement focus (six days)

• Days 1–5: 30 minutes brisk walk (talk-test confirmed moderate intensity).
• Day 6: Long walk or hike 60–90 minutes at a conversational pace with inclines.
• Day 7: Rest or very light walking.

Template C — Strength and walk hybrid

• Days 1 & 4: Strength training 20–30 minutes + 20-minute easy walk.
• Day 2: Hill intervals 30–40 minutes.
• Day 3: Rest or gentle walk 15–20 minutes.
• Day 5: Speed intervals 30 minutes total.
• Day 6: Long walk 60 minutes.
• Day 7: Rest.

These templates translate principles into daily practice. Adjust frequency, intensity, and duration for individual needs.

Safety Checklist Before You Start

• Medical clearance: Seek approval if you have heart disease, uncontrolled hypertension, recent surgery, or new-onset symptoms (chest pain, dizziness).
• Foot health: Address blisters, bunions, or neuropathy proactively with footwear and podiatric consultation when needed.
• Hydration and heat: Avoid exercising in extreme heat. Carry water and wear breathable clothing when temperatures are high.
• Visibility: Wear reflective clothing and lights when walking near vehicles in low light.
• Emergency plan: Carry an ID and, when appropriate, a phone. Consider walking with a partner in isolated areas.

Following these precautions minimizes risk and makes walking sustainable long term.

Measuring Success Beyond the Scale

Weight provides one outcome measure, but walking produces many non-scale wins that indicate improved cardiometabolic health.

• Resting heart rate declines.
• Faster recovery heart rate after exertion.
• Increased walking pace at the same perceived effort.
• Better mood and reduced stress.
• Improvements in blood pressure and fasting glucose.
• Greater endurance: longer walks feel easier.
• Functional gains: easier stair climbing and daily activities.

Track several of these markers to keep motivation high and progress visible.

Common Questions About Walking Intensity and Results

• How fast should I walk to get cardiovascular benefits? Aim for brisk walking where conversation becomes somewhat labored. Watch for heart rate within roughly 50–70% of your estimated HRmax or an RPE around 12–14.
• Can walking replace running for fitness? Yes, for many people. Walking provides substantial cardiovascular, metabolic, and longevity benefits with lower injury risk. Runners may achieve higher VO2max with running, but well-structured walking programs reduce many of the same risks and improve daily function.
• How many steps equal a cardio workout? Steps alone don’t capture intensity. A brisk 30-minute walk may be 3,000–4,000 steps and produce meaningful cardio benefit. Combine step counts with intensity measures to quantify workouts.
• Will walking help me lose weight? Walking increases caloric expenditure and, when paired with dietary moderation, contributes to weight loss. Long-duration moderate walks and intervals increase energy burn and fat oxidation.
• Is walking enough to improve VO2max? Yes, walking improves VO2max, particularly in previously sedentary individuals. Gains are greater when intervals or higher intensities are included.
• Can people with knee pain walk for cardio? Often yes. Walking is low impact and improves joint support through stronger surrounding muscles. Start slow, use poles if needed, and consult professionals for persistent pain.

FAQ

Q: How often should I walk to get cardiovascular benefits? A: Aim for at least 150 minutes per week of moderate-intensity walking, distributed across most days. Three to five sessions per week of 30–60 minutes each produce reliable improvements.

Q: How do I know if my walk is “brisk” enough? A: Use the talk test—if you can speak but your sentences require occasional breaths, you’re usually in the moderate-intensity zone. Confirm with heart-rate monitors (50–70% HRmax) or an RPE of 12–14 on the Borg scale.

Q: What are safe ways to increase intensity? A: Add short intervals of faster walking, include hills or incline, use Nordic poles, or add very light external load. Increase one variable at a time and follow the 10% progression rule.

Q: Can walking alone improve blood sugar control? A: Regular brisk walking improves insulin sensitivity and reduces post-meal glucose spikes. Short walks after meals are particularly effective for blunting postprandial rises.

Q: Is it okay to walk every day? A: Yes. Daily light-to-moderate walking supports cardiovascular health and recovery. Include at least one rest or active-recovery day per week if you are performing high-intensity sessions.

Q: Should I use a treadmill or walk outdoors? A: Both work. Treadmills allow precise pace and incline control. Outdoor walking provides varied terrain and environmental benefits such as sunlight exposure and mental restoration. Mix both as preferences and weather permit.

Q: What if I don’t have time for long walks? A: Break activity into shorter bouts. Three 10-minute brisk walks spread across the day produce cardiovascular benefits similar to one 30-minute session.

Q: When should I seek medical advice before walking more intensely? A: Consult a healthcare professional if you have known cardiovascular disease, uncontrolled hypertension, recent cardiac symptoms, or other chronic conditions that affect exertion responses.

Q: How long before I see health improvements? A: Acute changes such as improved mood and better post-meal glucose control can occur within days. Meaningful cardiovascular adaptations—lower resting heart rate, improved endurance, and favorable metabolic shifts—typically appear within 6–12 weeks of consistent training.

Q: Can walking replace resistance training? A: Walking complements but does not replace resistance training. Strength work preserves muscle mass and bone health and supports sustained walking performance. Include resistance sessions two times per week where possible.

Walking delivers measurable cardiovascular returns when structured and progressive. It fits a wide range of lifestyles and physical function levels and provides durable benefits without the injury risks of higher-impact sports. With clear targets and modest planning, a pedestrian pace becomes an effective engine for heart and metabolic health.