Isotonic exercise is a form of strength training that is beneficial for those looking to build muscle and lose weight. Exercises like lunges, and squats come under this type of training.
If you enjoy working out, your fitness routine probably includes exercises like squats, lunges, and push-ups. These are all examples of isotonic exercise, a form of strength training in which the muscles are required to resist weight over a range of motion. This type of training is not only good for improving physical strength, but also for flexibility, and balance. It is also an effective way to burn calories and get rid of extra body fat. As you explore the benefits of isotonic exercise, know which moves you can include in your fitness regime.
What is the isotonic exercise?
It is categorised as exercise which involves the contraction and shortening of muscles through a variety of movements, including those of the joint. “During this type of training, the body’s muscles change their length as per the movement to create and support joint movement with constant load or weight,” says fitness expert Aman Puri. This type of exercise overcomes resistance, where the body’s muscles keep a consistent level of tension or load during that movement.
It usually includes exercises like push-ups, and running or even everyday tasks like cleaning, or carrying groceries. Isotonic exercise can also be performed with equipment involving weightlifting machines, dumbbells and resistance bands.
Isotonic exercise can build strength. Image courtesy: Adobe Stock
What are the benefits of doing isotonic exercise?
1. Strengthens muscle and endurance
This type of exercise increases muscular strength and challenges muscles by focusing on repetitive movements that enhance endurance and improve overall strength. “In isotonic exercise, the muscles relax and contract through different range of motions, gaining more ability to handle repetitive and sustained movements,” says the expert. Isotonic exercise can improve muscle tone, increase physical power, and help build muscles, as per research published in Healthcare in 2022.
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2. Improves flexibility and joint mobility
Isotonic exercise includes motions from a diverse range of movements, so it enhances flexibility and improves the mobility of joints. During a 2022 study, published in Applied Sciences, isotonic exercise was found to be effective in improving flexibility.
3. Promotes blood circulation
Isotonic exercise like running which involves dynamic and repetitive movements promotes cardiovascular health. “It enhances blood circulation and oxygenation, which can boost heart health. The pumping of the blood may also reduce the chances of stroke,” says Puri.
4. Enhances balance and coordination
In this type of exercise, muscles are worked upon in a controlled and repetitive manner, which improves neuromuscular control. “This controlled movement leads to balanced and better coordination by improving and stabilising muscles, flexing up the joints improving overall body movement,” says the expert
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5. Helps manage weight
It helps improve metabolism and promote fat burning as they involve several muscle groups and require repetitive activity which helps burn more calories. Squat, a popular move, is an example of isotonic exercise. During a 2013 study, published in the Journal Of Sports Science And Medicine, researchers found that squat training significantly decreased body fat and increased the lean body mass in participants.
What is the difference between isometric and isotonic exercises?
It may be beneficial for strengthening muscle mass and improving power and endurance. “On the other hand, isometric exercise may be beneficial for toning or for those recovering from injuries as it does not involve loading the muscles or increasing muscle tension,” says the expert.
While performing isotonic exercise, the muscle length is shortened with constant tension or weight. On the other hand, while performing isometric exercise, the muscle length does not change as tension increases.
Also, isotonic exercises involve joint movement whereas isometric exercises do not involve any joint movement.
What are the examples of isotonic exercise?
1. Lunges
Take a step forward with one of your legs then gradually lower your hip with both your knees bent around 90 degree.
Push your body through the front foot to go back to the starting position and do it again with your other leg.
2. Squats
Stand up on your feet apart aligned with the shoulder-width.
Bend your knee, lowering your hips and keeping your back in a straight position.
Continue lowering your hips down till your thighs become parallel to the floor.
Push up your body by returning back to a standing position while straightening your knees.
Also Read: 10 benefits of squats — and 7 squat variations to add variety to your fitness routine
3. Push-ups
To perform push-ups, start with the position of the plank. Place your hands a little wider apart from shoulder width.
Lower your body down by bending both your elbows reaching lower till your chest is near the ground level.
Push up your body back keeping your back straight.
Straighten your elbows as you push up your body and go back to the starting position.
4. Kettlebell swings
In this isotonic exercise, first hold the kettlebell weight with both your hands and then stand by keeping your feet shoulder-width apart.
Gradually bend your knees and swing back the kettlebell between both your legs, moving your hips forward trying to swing the kettlebell upto your chest level.
5. Leg press
It is performed with the leg press machine. Sit by placing your feet shoulder-width apart on the machine’s platform.
Extend your legs upwards, pushing the platform upwards.
Gradually bend your legs back, lowering the weight down.
Do jumping jacks for strength and weight loss. Image courtesy: Adobe Stock
6. Jumping jacks
Jumping jacks do not require any equipment. You just need to simply stand with arms straight.
Start jumping while extending the feet apart and raising both your arms overhead in alternate movement.
Jump back again to return back to the straight position.
7. Deadlift
To carry out this exercise, stand with your feet and hips aligned to the same width.
Grip the barbell with both hands in front of your thighs and start lifting the barbell while bending your knees, and lowering your hips.
Lift the weight holding the barbell and then lower the barbell back to the ground keeping your back straight.
After that return to the standing position, straightening the knees and hips.
8. Mountain climber exercise
Start in a plank posture with your arms straight on the ground position and extending your legs backwards supported by your toes.
Bring your knees in forward direction near the chest, and switch legs alternately.
Who should avoid doing isotonic exercise?
“Everyone can perform some form of isotonic exercise regularly,” says Puri.
Since isotonic exercise also involves weights, those with sprains, muscle tears or bone injuries involving fractures and dislocation should avoid performing an intensive form as it may aggravate the risk of injuries.
Those with cardiovascular issues like heart disease and high blood pressure should consult their doctor as performing isotonic exercise can raise blood pressure levels.
Isotonic exercise, a form of resistance training, is a great way to improve muscle strength and endurance. So, go for exercises like lunges, and deadlift to stay strong and fit.
Related FAQs
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Is yoga isotonic or isometric?
Yoga mainly involves isometric movements. Isometric muscle contractions can be seen in asanas like uttanasana (standing forward bend) and dandasana (staff pose), where moving from the plank position leads to the lengthening of muscles and joint movement while resisting gravity.
Is jumping isotonic?
Yes, jumping is an isotonic exercise as it involves altering the muscle length with muscle resistance in motion. Jumping is also known as a plyometric strengthening exercise and helps increase isotonic movement involving muscle contractions. It especially improves the vertical jumping ability.
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.
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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
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Sets: 2 Reps: 12-15 each side
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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.
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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
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Sets: 2 Reps: 8-10
Why: This is a gentle stretch for the muscles in the front of the shin.
How:
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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
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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.
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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
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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.”
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Try swapping to: machine chest press
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“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
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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.”
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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
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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
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“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
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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
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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
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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
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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
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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
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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
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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.
