Cardiorespiratory fitness refers to how well your body does while performing a physical task. A healthy diet, weight control and interval training are great ways to improve this.
An increase in stamina, low chances of heart disease and control over high blood pressure are all benefits of cardiorespiratory fitness. Cardiorespiratory fitness, also known as cardiorespiratory endurance, cardiovascular fitness, and cardiovascular endurance, improves oxygen levels in the lungs and heart when we are doing anything that involves physical exertion.
Cardiorespiratory fitness refers to how well your body can perform when you are exercising. If your cardiorespiratory fitness is on point, you can endure long, physical exercise without getting tired. Read on to learn more about cardiorespiratory fitness, the exercises that can help you improve it, as well as the risks involved.
What is cardiorespiratory fitness?
Cardiorespiratory fitness (CRF) refers to the ability of the cardiovascular and respiratory systems to deliver oxygen during prolonged physical activities. “It is an important sign for overall health and heart function,” explains cardiologist Dr Chirag D.
According to research published in Nutrition in the Prevention and Treatment of Abdominal Obesity, cardiorespiratory fitness can be determined by gender, age and genetics, as well as, the relationship between your health and physical activity. Strong CRF allows you to perform daily activities with more ease, reducing fatigue during tasks like climbing stairs or carrying groceries. It also helps you recover faster from exercise, allowing you to get back to your workout routine sooner.
Advertisement
What are the various endurance tests for cardiorespiratory fitness?
Your cardiorespiratory fitness can be measured through some tests.
Also Read
The Treadmill Stress Test is when a patient is hooked on to electrodes to measure his heart function while doing an exercise. Image courtesy: Freepik
1. VO2 Max Test
This test measures the maximal uptake of oxygen in a high-intensity exercise. In this exercise, you get on a treadmill or a bike and increase your intensity every few minutes, until you are exhausted. This method is touted to be the most accurate one, states this research, published by the University of Virginia.
2. 6-Minute Walk Test
This test evaluates sub-maximally distance covered within six minutes. This test is low risk and is useful in assessing adults who have love cardiorespiratory fitness, states this study, published in Pulmonology.
3. Treadmill Stress Test
This test monitors heart rate during increasing intensity levels on a treadmill. This test is usually done in a lab, where electrodes are put on the patient’s chest, and these are then connected to an ECG machine. This makes a record of all heart activity, including blood pressure and heart rate, states this study, published by the National Institute of Health.
What are the causes of low cardiorespiratory fitness?
Various causes are associated with low respiratory fitness levels. Some of these are as follows:
Advertisement
Sedentary lifestyle: No regular exercise and sedentary desk jobs can lead to cardiorespiratory fitness levels dropping. No exercise often leads to fatty material in your arteries. This can cause serious problems, including a heart attack. Exercise is beneficial for cardiovascular health, states this study, published in Frontiers in Cardiovascular Medicine.
Chronic diseases: Illnesses like heart attack, diabetic condition, and lung problems can also lead to a drop in cardiorespiratory fitness. This disease can also cause pain and fatigue.
Obesity: The burden of excessive body weight on the heart and lungs can lower cardiorespiratory fitness levels. It may also lead to cardiovascular diseases and needs to be worked on at once, reports a study, published in the Journal of Obesity.
Aging: Gradual deterioration of body strength and muscle mass over time. A study, published in the Archives of Internal Medicine, states that cardiorespiratory fitness levels decrease with age.
How can you improve your cardiorespiratory fitness?
There are various ways to work on your cardiorespiratory fitness levels. Here are a few ideas that you can try out.
Select Topics of your interest and let us customize your feed.
PERSONALISE NOW
1. Regular aerobic exercise
Regular exercise such as walking, running, and cycling improves the performance of both the heart and lungs. A study, published in Research Quarterly for Exercise and Sport, states that adults should do 150 minutes of moderate-intensity or 60 minutes of vigorous-intensity physical activity per week, as recommended by the American College of Sports Medicine (ACSM) and the American Heart Association (AHA).
2. Interval training
Endurance can be enhanced through fluctuating intensities between highs and lows. High-intensity interval training is a form of exercise where you have short periods of intense and explosive movements, followed by low-intensity exercise or even rest. This helps control obesity and increase cardiorespiratory fitness levels, states this study, published in Frontiers in Public Health.
3. Healthy diet
Nutrient-rich foods support overall physical health and energy levels. A study, published in Nutrients, observed the impact of a healthy diet on a group of Korean adults from 19-64 years. The VO2 Max test was used to determine the cardiorespiratory fitness levels. It was seen that adults, in the age group of 19-34 years, reported high CRF levels.
Advertisement
4. Consistency
Regular, sustained effort is crucial for long-term improvements. Make sure that you continue to do the above-mentioned things regularly to see a change.
Cardiorespiratory fitness can be improved by regular exercise. Image courtesy: Freepik
Cardiorespiratory activities
You can try some cardio-respiratory activities that help elevate your breathing and heart rate for an extended period of time, suggests fitness expert and Fit India Ambassador Wanitha Ashok.
Brisk walking
Running
Jogging
Cycling
Swimming
Aerobics
Dance
Zumba
Jumping rope
Stair climbing
Treadmill
Stationary cycling
Cross trainer
Circuit training
High-intensity interval training (HIIT)
Kickboxing
What to keep in mind while doing CRF exercises?
Make sure to keep these things in mind when you practice cardiorespiratory fitness:
One should start slow and gradually build the workout in terms of duration and intensity.
You should not push yourself and listen to your body.
Hydration before, during and after the cardio respiratory exercises is advised to replace the list water in the form of sweat and to prevent giddiness and nausea.
It’s not advisable to do cardio respiratory exercises in the hot Sun, the best time to workout is early morning or evenings. In cold temperatures it’s advisable to be dressed in layers.
What are the risk factors related to cardiorespiratory fitness?
Low cardiorespiratory fitness, linked to an inactive lifestyle, weakens your body’s ability to use oxygen during exercise. Age, genetics, and certain medical conditions can also contribute. Additionally, high lipid values, high blood pressure, higher heart rates, higher waist circumference and higher body fat percentages can affect cardiorespiratory fitness levels, states this study, published in Scientific Reports.
Regular physical activity is key to improving your CRF. Even small increases in activity can significantly benefit your heart, lungs, and overall health.
Shin splints are one of those nagging aches and pains most runners encounter at some point in their training—but that doesn’t mean you should just grin and bear it.
“We see it all the time in the clinic,” osteopath and clinical lead at The Livewell Clinic, Danny Sayandan tells Fit&Well.
Common themes, he says, are runners in worn-out shoes, heel striking instead of landing midfoot, or overstriding.
“It’s often linked to the least stretched muscle in the body—your calves—and most neglected muscle—the tibialis anterior—found on the front of the shin,” says Sayandan.
Advertisement
When they’re tight or undertrained, the impact of every footstrike gets pushed straight into the shins, triggering a dull ache down the front or inside of your shins.
The solution? Add these five exercises from Sayandan to your weekly workouts to stretch and strengthen these often overlooked muscles.
5 exercises to try if you get shin pain when running
1. Toe raise
Toe Raises – Ask Doctor Jo – YouTube
Watch On
Sets: 2 Reps: 12-15 each side
Start your week with achievable workout ideas, health tips and wellbeing advice in your inbox.
Advertisement
Why: Lifting your toes strengthens the front of your shin.
How:
Stand with your feet hip-width apart.
Lift your toes.
Hold for two seconds.
Lower your toes to the start.
2. Calf raise
Sets: 2 Reps: 12-15
Why: Build strength and endurance in the lower legs.
How:
Stand with your feet together.
Lift your heels to rise onto your toes and the balls of your feet.
Pause, then lower slowly.
You can also perform these with your heels off a step (as in the video above), lowering your heels below the step to add a stretch to your calves.
As you get stronger, progress to single-leg calf raises, then begin to add weight with a dumbbell or kettlebell held in one hand.
Advertisement
3. Soleus wall hold
Sets: 2 Reps: 12-15 / Time: 30sec
Why: This bent-knee heel raise targets the deep-lying soleus muscle in your calves.
How:
Stand with your feet hip-width apart, holding a bannister or other sturdy anchor point for support (an alternative is to rest your back on a wall, as in the video above).
Bend your knees and push your hips back to lower into a squat, with your knees bent at 90˚.
Hold this position and either perform 12-15 calf raises (see above), or rise up onto the balls of your feet and hold for 30 seconds.
4. Tibialis stretch
Anterior Tibialis Stretch Kneeling – Ask Doctor Jo – YouTube
Watch On
Sets: 2 Reps: 8-10
Why: This is a gentle stretch for the muscles in the front of the shin.
How:
Advertisement
Kneel with your feet together, sitting on your heels with your hands or forearms on the floor to help control the load through your ankles.
Push through your hands or forearms and carefully lift your knees to increase the stretch in the front of your shins.
Hold for a few seconds, then lower.
Rather than an exercise, try to practice this continuously—and certainly as you move from exercise to exercise in this workout. Concentrate on landing softly through your midfoot to retrain your gait and reduce impact through your heel, ankle, calves and shins.
Just because an exercise is considered a ‘classic’ or everyone on the gym floor is doing it, doesn’t necessarily mean it’s the best for muscle growth. While there are lots of exercises out there that are effective for hypertrophy, there are some that are arguably ever so slightly better, due to the fact that they’re easier to progressively overload, or are more convenient, time-wise.
If you’ve started to hit a plateau in your training or feel your gains have been somewhat minimal, then it may be time to switchup your programme. Exercise Researcher, Dr. Pak Androulakis-Korakakis, has shared five exercises in a recent YouTube video, that he’s stopped doing for muscle growth, and some smart swaps you can try instead to unlock better (and hopefully bigger) results…
Barbell back squat
(Image credit: Getty Images)
The barbell back squat is hailed as the king of lower body exercises – like, if you don’t do it, who are you? But is it best for honing in on your quads? Dr. Pak would disagree. “Barbell squatting, in my opinion, is not the most time-efficient way to blast your legs, and can feel ‘meh’ given that it overloads your spine.” It’s also not the safest exercise to go all out to failure on.
Advertisement
Try swapping to: barbell front squat or leg press machine
For those who love barbell work, but don’t look forward to back squatting, Dr. Pak recommends trying the front squat. His reasonings: you’ll use less weight (so it’s less of a pain to set up), and using an anterior load can increase knee flexion so that you can sink deeper into the squat, meaning a bigger stretch on the quads. For those who want to sack off the barbell altogether, try the leg press. “Exact same movement pattern as the squat, without the actual loading. Minimal setup required, easy to fail safely,” he says.
Barbell bench press
(Image credit: Getty Images)
Another classic strength exercise and a staple in Arnie’s chest routine back in his heyday. However, the bench press isn’t always freely available and, although it absolutely encourages chest hypertrophy, some people do find it uncomfortable to perform. “For me, I often felt it in my shoulders, and it bothered me from session to session,” says Dr. Pak. “It can also be a bit annoying that you need a spotter if you want to push hard.”
Advertisement
Try swapping to: machine chest press
Get all the latest news, reviews, deals and buying guides on gorgeous tech, home and active products from the T3 experts
“It’s super easy to set up, allows me to train close to failure without the mental load of being trapped under a barbell, and you can adjust the incline, the grip – it’s very versatile.” Don’t have access to this machine? Dr. Pak also says the dumbbell chest press is a fantastic option, as it gives you more range of motion and you can target different areas of the chest, depending on the position of your weight bench. No dumbbells? Deficit push-ups and dips are his bodyweight alternatives.
Bent-over barbell rows
(Image credit: Shutterstock)
When a wide thick back is the goal, everyone immediately thinks ‘bent-over barbell rows’. Yes – a great exercise, but Dr. Pak says it isn’t without its terms and conditions. “Bent-over barbell rows absolutely torch your lower back, especially if you’re pushing heavy weights and close to failure. While that’s not inherently bad, it becomes a bit of a problem, sometimes, and it can be annoying when you’re trying to bias certain parts of your back.”
Advertisement
Try swapping to: bent-over dumbbell row
“I’m able to get more range of motion, have a bit more control, be able to be a bit more versatile with my grip, and in general, it’s a very versatile exercise that only requires you to grab the dumbbells, bend over and do them.” Dr. Pak also adds it’s a great exercise to superset with a chest exercise (think dumbbell press press above), ideal if you’re tight for time and need a workout you can get done sharpish. “A better bang for your buck option,” he says.
Leg extension machine
(Image credit: Getty Images)
We know what you’re thinking ‘What! But leg extensions are brilliant for hypertrophy – no setup required, easy to push to failure…’. All correct, and Dr. Pak says he still does these from time to time, by the way. However, there is a bodyweight exercise that he currently prefers…
Try swapping to: sissy squats
Advertisement
“Not only are they effective at torching the rec fem (rectus femoris, the long muscle that runs down the front of your thigh), but they’re also easy to superset with leg curls, which makes them a killer combo for busy hypertrophy sessions,” says Dr. Pak. This is a tough bodyweight exercise in general, but if you are able to nail it for reps, Dr. Pak suggests increasing the difficulty by slowing down the tempo, increasing your range of motion (so going lower) and, we’ll throw our two pence in, you can also add a weight belt.
Dumbbell skullcrushers
(Image credit: Getty Images)
We all know that if you want bigger arms, the triceps will need a significant amount of attention (not just the biceps), because they make up the majority of our upper arm. But Dr. Pak says he’s stopped doing skullcrushers altogether. “Don’t get me wrong they train the longhead of the triceps, and they’re simple to set up, and also quite hardcore when you do them right. That said, after a while, they started to bother my elbows a little bit more on high rep sets.” If you experience something similar, here’s what you can try instead…
Try swapping to: skullovers
This is a hybrid between a skullcrusher and a dumbbell pullover. “You’re still blasting the triceps, but the movement feels a bit more natural and the stretch at the bottom is a bit smoother. They also feel a bit easier to control through the full range of motion, and I find that I can get closer to failure without things feeling off with my elbows,” he says. Obviously, if skullcrushers don’t bother your elbows, keep doing them, or give these a go if you want to try something different.
The mitochondria are considered the ‘powerhouses’ or ‘engines’ of your cells. As Dr. Terry Wahls points out, most chronic diseases involve dysfunctional mitochondria. Poorly functioning mitochondria play a big role in disease risks, a slower metabolism, and the aging process. Researchers have concluded that exercise improves mitochondrial quality and function and stimulates mitochondrial turnover. It’s time to start thinking about these little organelles that have a big impact on our wellness and longevity.
Exercise for your mitochondria
Tima Miroshnichenko / Pexels
Additional research also revealed that just 12 weeks of resistance exercise training yielded qualitative and quantitative changes in skeletal muscle mitochondrial respiration. Not only did resistance training increase lean body mass by 4% and quadriceps muscle strength by 15%, but staying committed to those 12 weeks of training also improved the respiratory capacity and functioning of the mitochondria.
So, which exercise is superior for improving mitochondrial functioning? Which exercise results in the most dramatic positive cellular changes? Let’s dive into the research.
The study
Julie Larson / Pexels
In a study published in Cell Metabolism, the researchers explored how different types of exercise — resistance training, high-intensity interval training (HIIT), or a mix of both — change muscles and cells at the molecular level in younger and older adults. The researchers focused on how genes and proteins respond to exercise, how exercise impacts the mitochondria, and how these changes affect overall fitness and metabolism.
The study methods
Ardit Mbrati / Pexels
For 12 weeks, younger and older adults completed one of three exercise programs: traditional resistance training, HIIT, or a mix of both at a lower intensity. The researchers measured fitness and VO2 peak, insulin sensitivity, muscle mass and strength, mitochondrial health and function, and changes in gene activity and protein levels in muscle.
The results
Cotton Bro / Pexels
Here are the study results:
HIIT has the biggest impact in improving aerobic fitness, insulin sensitivity, and mitochondrial function, compared to other workouts. These results were especially noticeable for older adults.
HIIT reversed some age-related declines in muscle mitochondria and enhanced the cell’s ability to make new proteins.
HIIT enhanced mitochondrial capacity by close to 50% for young adults and nearly 70% in older adults.
Resistance training mostly helped build muscle mass and strength, but didn’t have as much of an impact on aerobic fitness or mitochondria. The combined training resulted in smaller and moderate benefits compared to just doing HIIT alone.
Changes at the molecular level
Cotton Bro / Pexels
HIIT caused significant increases in gene activity and protein-building machinery. Most of the benefits from exercise take place after the genes send their signals during the protein-building stage. HIIT improved protein quality and helped reduce damage to muscle proteins, which helps the body build new and efficient mitochondria.
Concluding thoughts
Cotton Bro / Pexels
This study shows that HIIT is one of the most powerful ways to improve muscle health and fitness even in later years. This type of exercise, which involves shorter bursts or intervals of higher-intensity movements, is superior for the mitochondria and helps your body make more and better mitochondria, which can slow age-related decline and boost your energy levels.
