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Include these 8 isotonic exercises to improve strength and flexibility

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Include these 8 isotonic exercises to improve strength and flexibility

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.
Isotonic exercise
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.

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Fitness

Enter 2026 stronger than ever with these expert-approved fitness tips

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Enter 2026 stronger than ever with these expert-approved fitness tips
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Whether you’re focused on building muscle, improving your balance or working on your ability to complete longer, sustained workouts, one thing’s for sure: you’ll need to take small, actionable steps to reach your fitness goals.

Remember, you don’t need to drastically overhaul your life on January 1. In fact, before making any major changes to your dietary pattern and exercise routine, it’s best to have a conversation with your doctor first, especially if you live with any chronic conditions. In the long run, you’ll most benefit from taking small, actionable steps to help achieve your fitness and nutrition goals, the experts say.

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We asked fitness experts to break down their top tips to help you kick off 2026 stronger than ever.

How to fit exercise into a busy schedule

If you’re hitting the reset button on your fitness routine, start small and choose an exercise you enjoy, says Dr. Kimberly Burbank, a primary care sports medicine fellow and team physician at UCLA Athletics. You don’t necessarily need to do the movements traditionally associated with exercise to get a good workout in, either. “I really encourage people to choose (a movement) they actually enjoy doing, because they will probably stick with it more,” she says.

To help set attainable fitness goals, one route is to use the SMART framework of goal setting, recommends Dr. Brandee L. Waite, a professor and vice chair of Wellness & Community Engagement Department of Physical Medicine & Rehabilitation at UC Davis School of Medicine, the medical director of the UC Davis Health Sports Medicine Clinic and the director of Lifestyle & Longevity Medicine Innovation.

The SMART acronym stands for goals that are specific, measurable, attainable, realistic and time bound, and what’s great about using this framework in an exercise context is that you’re able to approach fitness as you would any other appointment — if it’s scheduled on your calendar, there’s a greater likelihood you’ll honor it, Waite says.

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When it comes to fitting exercise into a busy schedule, “I try to encourage consistency over perfection,” Burbank says. Often, her patients will express frustration that they’ve missed a week of exercise — and therefore their entire workout schedule has been thrown off. While it’s important to “be as consistent as you can, (understand) that you don’t have to be perfect to still make a meaningful difference,” she says.

If you’re someone who prefers to exercise in the morning, try to make it easy for yourself when you wake up. “It’s so easy when that alarm goes off to just ignore it and move on. But if you have laid out your clothes the night before, have your coffee prepped (and) have your bag packed, then there’s so many (fewer) variables and barriers,” Burbank says.

How often should you exercise?

There’s no perfect cadence as to how often you should exercise. “What works really well for one person, will not work at all for another person. So, it does need to be personalized and realistic,” says Waite. However, there is something to be said about shorter, more frequent workouts. There’s a lower risk of injury, and they’re faster to complete and generally easier to stay consistent with, Burbank says.

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Ultimately, what’s most important is to meet a certain number of goal minutes every week, says Dr. Julia L. Iafrate, a sports medicine physician at NYU Langone Health and a team physician for the U.S. Ski Team. The Physical Activity Guidelines for Americans and the American College of Sports Medicine recommend adults participate in 150-to-300 minutes of moderate-intensity exercise a week. While this might sound intimidating, that breaks down to only 30 minutes of exercise a day over the course of five days, and could consist of a mix of pilates, yoga or brisk walking.

If you prefer vigorous-intensity aerobic exercises (like HIIT or running), it’s recommended you complete at least 75 minutes a week, which evens out to a little more than 20 minutes of exercise a day over the course of three days. On top of these exercises, the organizations suggest adults should partake in muscle-strengthening workouts at least two days a week.

What are the most beginner-friendly exercises?

There are a few forms of exercise that should be a central focus of your workouts: cardio, muscle strengthening and balance work. Practicing each type of exercise can help improve your ability to do the others and also reduce your risk of injury, Iafrate says.

  • Cardio. Incorporating aerobic exercises that get your heart rate up (such as running, swimming or cycling) is key to improving endurance, supports heart and lung health, and lowers your risk for a number of chronic diseases, Iafrate says. 
  • Muscle strengthening. Resistance training with weights stimulates two types of muscle contractions: eccentric loading and concentric loading. When you perform a bicep curl with a dumbbell in hand, that’s considered a concentric motion. As you lower the dumbbell and your arm straightens, that is an eccentric motion, Iafrate says. Both movements are important for strength building, tendon health and bone mineral density, she explains. 
  • Balance work. Functional movement training, including tai chi and yoga, is especially beneficial for maintaining flexibility, stabilizing your body and limiting the likelihood of falls down the line, Iafrate says. 
  • Weight-bearing exercise. “Walking, especially for beginners, is super underrated,” Burbank says. Getting your step count up to 7,000 steps a day offers immense benefits for health, including lowering your risk for cardiovascular diseases and type 2 diabetes, according to a 2025 study published in Lancet Public Health.

If you’re relatively new to exercise and don’t know what is helpful or harmful, Waite recommends having at least two-to-three sessions with a physical therapist to develop the right type of exercise program. For instance, if someone has a medical condition like hip arthritis, a professional can provide “modifications for a regular fitness training program that won’t further exacerbate the problem that is currently bothering them,” Waite says.

How can nutrition support fitness goals? 

“Nutrition and exercise have such a symbiotic relationship,” Burbank says. Throughout your week, prioritize whole, fiber-rich foods, including fruits, vegetables and whole grains. Americans aren’t consuming nearly enough protein, which is essential to muscle building, muscle recovery and satiety, Burbank notes. Your minimum daily intake of protein should hover between 0.8 grams to 1.2 grams of protein per kilogram of body weight. To increase your protein intake, the Dietary Guidelines for Americans 2020-2025 recommends incorporating more lean meats, poultry, eggs, seafood, legumes, nuts, seeds and soy into your diet.

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Hydration is particularly important, especially prior to working out. “When you’re dehydrated, (it will) increase your likelihood for fatigue and poor peak performance,” Iafrate says. Ideally, we should be drinking between 2.5 to 3 liters of water a day, Burbank says. 

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New Year’s Fitness Goals: Avoid These Common Mistakes

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New Year’s Fitness Goals: Avoid These Common Mistakes

A new year usually brings new fitness goals, fueling spikes in gym memberships and social media feeds filled with workout selfies. Yet, just as quickly as this wave of motivation appears, it usually recedes.

Why does this cycle repeat itself year after year? Well-meaning individuals often start with intense, all-or-nothing approaches that are difficult to sustain, fitness experts say. Life gets in the way, motivation wanes, and the pressure to see immediate results leads to burnout.

A commitment to fitness is a common challenge, and finding a solution is crucial for long-term success, according to Steven Hale, M.D., a primary care sports medicine physician with Baptist Health Orthopedic Care. To get expert advice on this topic, award-winning journalist Johanna Gomez hosted a new Baptist Healthtalk podcast featuring Dr. Hale.

He emphasizes that the most effective plan is one that fits into one’s life seamlessly.

“If it’s in your schedule every day, then you’re going to have to do something active,” Dr. Hale explains. “Whether that’s mobility, maybe you only have 20 or 15 minutes to stretch. Maybe you have an hour this one day because you got off work early. Now you can do some more strength training and maybe some increased cardio.”

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This approach shifts the focus from overwhelming daily workouts to simply incorporating movement into your daily schedule. Building on this foundation of practical advice, Dr. Hale answered some of the most common questions about starting a new fitness routine.

I haven’t worked out in a long time. What’s a good way to start without getting overwhelmed or injured?

Dr. Hale: It really depends on your previous activity level and experience with exercise. Someone who was a college athlete or has a lot of experience can probably go back to the gym, start with lighter weights, and build from there. For someone who is less experienced or doesn’t enjoy the gym environment, I often recommend starting at home. You can look up fun follow-along exercise videos on platforms like YouTube.

Classes can also be a great option for those new to exercise, as they provide guidance from instructors. Personal trainers are another fantastic resource if they fit your budget. The key is to start slow to minimize your risk of injury. Don’t go too hard in the beginning. The first few workouts might not feel great as you get back in shape, so making it fun and enjoyable will help you stick with it longer.

Diet and exercise are both important, but which one should I focus on more if I want to see results?

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Dr. Hale: As a doctor, I have to say they go hand-in-hand; I can’t recommend one without the other. Diet is just as important, if not more important, than exercise when it comes to seeing results quickly. In the short term, diet probably has a slight edge. We often talk about creating a calorie deficit for weight loss, which means the calories you consume should be less than the calories you burn.

It’s much easier to consume calories than it is to burn them. A single high-calorie meal can easily undo the effort of an hour-long workout. However, for long-term health, diet and exercise are equally important. What you put into your body for nutrients is just as vital as staying active. Instead of overhauling your entire diet at once, which is hard to stick to, try making one small, manageable change each week. For example, cut out one specific snack food or fast-food meal. This slow progression helps you build sustainable habits.

How do I know the difference between normal muscle soreness and an actual injury?

Dr. Hale: It’s a great question because many people enjoy the feeling of being sore after a good workout — it’s like a victory. Soreness is typically a dull ache that you feel after exercise, and it usually goes away within a few days. Pain that should concern you is more severe. On a pain scale of one to ten, anything greater than a three is something to pay attention to.

Concerning pain might also be sharp, or you might have felt a ‘popping’ sensation during your workout. Other warning signs include mechanical symptoms like a joint feeling unstable or locking up. These are more serious symptoms that indicate you should probably see an orthopedic specialist. It’s important to listen to your body and not push through sharp or worsening pain.

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The phrase “no pain, no gain” is very popular. Is it true that I need to push through pain to make progress?

Dr. Hale: That is one of the first myths I address in my practice. The “no pain, no gain” philosophy is not a good approach for orthopedic health. If you feel pain, it’s a sign that there is inflammation in that area. Pushing through that pain will only worsen the inflammation and delay your recovery.

Instead of pushing through it, pain is a signal from your body to rest or modify your activities. Give the affected area time to heal and for the inflammation to calm down before you return to that specific exercise. If you continue to push through pain, you risk causing the issue to last longer or become more severe. You can likely push through discomfort that is less than a three out of ten on the pain scale, but anything more than that requires attention.

I want to stay consistent, but I’ve heard working out every day is bad. How often should I be exercising?

Dr. Hale: This depends on how you define ‘workout.’ If you’re doing intense strength training where you are really stressing your muscles, those muscles need time to recover. Overtraining can lead to inflammation, pain, and a higher risk of injury. In that case, you need to build recovery days into your schedule.

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However, you can and should do something active every day. I recommend having something in your schedule daily because it makes it harder to use excuses and push it off. We can think of these as ‘mobility days’ versus ‘strength days.’ A mobility day could be stretching, yoga, or going for a walk. A strength day involves more intense activity like lifting weights or jogging. For example, a good plan could be three or four strength training days per week with active recovery like walking on the other days. This way, you are moving your body every day while still giving your muscles time to recover. Any activity is beneficial.

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Here’s how strong your grip should be in each decade of your life

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Here’s how strong your grip should be in each decade of your life

I recently took a longevity fitness test, an element of which included a grip strength assessment with a hand dynamometer. Research links grip strength to longevity, as it is considered a good indicator of overall physical strength and risk of frailty, as well as neuromuscular function (or the connection between brain and muscle).

How is grip strength linked to longevity?

“Handgrip strength is measured with a handheld dynamometer as the peak force produced by a maximal isometric contraction of the forearm muscles. From research, it is proven to give a quick, reliable snapshot of global muscle strength and is considered a biomarker for physiological reserve, rather than just hand function,” explains Athanasios Tzoumaris, strength and conditioning coach at London-based gym and health clinic Hooke Fitness, where I took my test.

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