Health and Wellness Blog

How Nutrition Affects the Mind and Body

How Nutrition Affects the Mind and Body

How Does Nutrition Affect Your Physical, Mental and Social Health?

Our diets have changed dramatically over the last century, and the impact of industrialization on our food supply has had devastating consequences for our health. The detrimental effects of highly processed foods on physical health are well recognized, but far less attention has been paid to their consequences for mental health and well-being.

The Body: Eating a healthy diet enables easy body movements. A poor diet with unhealthy food choices can make each movement a major effort filled with stress, strain and pain.

The Mind: Food supplies the source of power for your brain as well as your body, and has a direct relationship to mental and emotional health and stability.

Learning and memory, illnesses such as depression, schizophrenia, Alzheimer’s disease and Parkinson’s disease benefit from a healthy, reduced-calorie diet that includes a variety of colorful fruits and vegetables and fish high in omega-3 fatty acids, such as salmon.

Eating and Relationships: Eating a healthy, balanced diet prevents weight gain, lowers your risk for diet-related illnesses, such as heart disease, diabetes, cancer and depression, and gives you the energy to have a full and rewarding social life.

READ MORE

 

How Does Your Diet Affect Depression?

One of the best natural remedies for depression is good nutrition. Surprised? Learn how a healthy diet can improve your state of mind!

 

A Healthy Gut Leads to a Healthy Mind

Overall, be sure you avoid nutritional deficiencies and mental or physical fatigue so you can keep the body balanced and ultimately, feeling your best.

In Ayurveda, many types of foods and herbs are used to bring this crucial balance back, depending on how your body needs it the most. Though each of our bodies are different, there are some foods that work well for us all.

READ MORE

 

A Healthy Balance – The Mind/Body Nutrition

DId you know our thoughts and feelings about food are just as important as what we put in our mouths?

If you have a healthy relationship with your food, it will have a healthy relationship with you.

Eating while we’re mentally stressed or emotionally wound up usually leads us to eat more. It may cause us to choose poorer-quality foods, and leave us with symptoms of digestive distress. Marc David, of the Institute for the Psychology of Eating in Boulder, Colorad, emphasizes that no food or diet is healthy if we’re stressed when we eat.

READ MORE

 

Center for Massage Therapy Philosophy

Our distinguished team of massage therapists listens with sensitivity to the needs of our clients and provides caring and comprehensive clinical massage therapy for injury, stress management, nutrition, relaxation, and sports.

I strive to integrate a holistic approach with a very specific treatment, and to expand client’s awareness of their own body, mind, and lifestyle, so they can improve the quality of their lives in the long run. – Elena Paskova

To prevent future injury, we promote body awareness, flexibility, and strength. Come and see why our massage therapy clinic was voted one of the Top 10 Places in Denver to receive a massage by Citysearch – Best of Denver.

I know what is a sick body and what is a very strong and powerful body of an athlete and what is a super pure and clean body of a yogi, and how these affect the mind and awareness and how these can be changed through your diet, lifestyle and specific treatments. – Kalin Davidov

CALL US AT 303-777-1151.

Why a Relaxing Massage is the Best Gift for the Holidays

Why a Relaxing Massage is the Best Gift for the Holidays

Give the Gift of a Relaxing Massage This Holiday Season!

A therapeutic massage is the perfect gift for the holidays.

When you give the gift of a massage at the Center for Massage Therapy, you’re giving your special one a personal session of relaxation that reduces stress and pain, elevates mood and a strengthens the immune system.

ORDER GIFT CERTIFICATE

Give a relaxing massage as a gift certificate, simply click here or call us at 303-777-1151 with your credit card information to order your massage gift certificate. Gift certificates expire 6 months from their date of purchase.

 

Gft Certificates - Holiday Gifts - Gift of Massage

 

Benefits of Sports Massage Therapy for Athletes Seeking High Performance

Benefits of Sports Massage Therapy for Athletes Seeking High Performance

Benefits of Sports Massage

Sports Massage can…

  • Help prevent injuries.
  • Relieve pain.
  • Relieve swelling.
  • Reduce Muscle tension.
  • Decrease recovery time.
  • Reduce heart rate.
  • Reduce blood pressure.
  • Increase blood circulation.
  • and much more.

Sports Massage Techniques

Our massage therapists use a variety of movements and techniques to try to help the athlete’s body achieve maximum performance and physical conditioning.

Techniques used include: Swedish style massage, effleurage (stroking), petrissage (kneading), compression, friction, tapotement (rhythmic tapping), vibration, gliding, stretching, percussion and trigger point therapy.

Each sport and athlete uses muscle groups in a different way. Sports massage addresses these differences while keeping the whole athlete in mind.

Sports massage can help heal you reach peak performance while minimizing the risk of injury.

Call to schedule your Sports Massage at 303-777-1151 now. We also offer gift certificates for the athlete in your life.

 

The 5 Benefits of Massage Therapy for the Serious Weightlifter

The physical effects of massage therapy can greatly improve a weightlifter’s health and lifestyle by alleviating pain and reducing potential for injury in several ways…

READ MORE

Weightlifting - Benefits of Sports Massage

 

How Athletes Can Benefit from Massage Therapy

Muscle stiffness, soreness, micro-trauma, inflammation, joint disorders, all start to take their toll on our bodies. Massage can be the solution to both the physical and mental strain we endure for our healthy lifestyles…

READ MORE

 

The Healing Benefits of Sports Massage for Football Players

Football is really a difficult sports activity. Massage benefits football players by flushing and keeping muscles maintained and good shape. These health benefits leads to faster recovery times and increased training.

READ MORE

 

Sports massage is typically used pre-event, post-event, and for maintenance. Stress and tension builds up in the body’s soft tissues during physical activity. Over-exertion and over-use can cause minor injuries and lesions, sports massage techniques are designed to break them down efficiently.

Schedule your Sports Massage at 303-777-1151.

 

Benefits of Pre-Natal Massage During Pregnancy

Benefits of Pre-Natal Massage During Pregnancy

Pre-Natal Massage

Research is proving that prenatal massage therapy can also be very beneficial in women’s prenatal care. Studies indicate that massage therapy performed during pregnancy can reduce anxiety, decrease symptoms of depression, relieve muscle aches and joint pains, and improve labor outcomes and newborn health.

READ MORE

 

The Benefits of Womb and Breast Massage

Historically women have understood the benefits of massaging the areas over the womb and the breasts… they knew this type of touch had the ability to help them heal and reconnect with their core and divine feminine energy…

READ MORE

 

Benefits of Pre-Natal Massage

A common symptom during pregnancy is edema (swelling) of the joints. Edema during pregnancy is often caused by reduced circulation and increased pressure on the major blood vessels by the heavy uterus. Massage therapy can help stimulate soft tissues to reduce collection of fluids in swollen joints, which also improves the removal of tissue waste, carried by the body’s lymph system.

Another common complaint is sciatic nerve pain. Sciatica is experienced by many women in late pregnancy as the uterus rests on muscles of the pelvic floor and lower back. The pressure of the uterus spreads tension to the muscles of the upper and lower leg, causing them to swell and put pressure on nearby nerves.

Massage therapy addresses the inflamed nerves by helping to release the tension on nearby muscles. Many women have experienced significant reduction in sciatic nerve pain during pregnancy through regular massage.

What Is The Difference Between A Medical Massage And A Spa Massage?

 

Swedish Massage

Massage therapy addresses different needs through varying techniques, one of which is called Swedish massage, which aims to relieve tense muscles and improve lymphatic and blood circulation. Swedish massage is recommended because, through mild pressure applied to the muscle groups of the body, it addresses many common discomforts associated with the skeletal and circulatory changes brought on by hormone shifts during pregnancy.

 

Pre-Natal Massage Therapist

A trained prenatal massage therapist knows where a pregnant woman’s sore spots are likely to be and may be able to provide some relief. (She’ll also know which areas and techniques to avoid.)

READ MORE

 

Elena Paskova is a massage specialist in Pre/Post Natal Massage at the Center for Massage Therapy.

Call 303-777-1151

Yoga Master and the Benefits of Yoga – Yoga for Energy Video

Yoga Master and the Benefits of Yoga – Yoga for Energy Video

Benefits of Yoga

Yoga improves your flexibility, builds muscle strength, protects your spine, boosts your immune system and much more. Practicing yoga makes you happier, helps you focus, improves your balance, increases your self-esteem, builds awareness and many more benefits.

READ MORE

 

The practice of yoga has many health benefits associated with it, so read below to discover even more benefits of incorporating yoga in to your health and fitness program.

BENEFITS OF YOGA

 

Yoga Video

8 Minute Yoga For Energy Boost – Vinyasa Flow For Beginners Workout

 

Yoga Master

“Yoga not just entered my life,” he writes, “but now, it is my life.”

The clear progressive stages of transformation through yoga are documented here. as nowhere else. This new sequence unfolds a practical road-map for knowing and practicing the elevation of the seeker’s awareness – from the physical, to the astral, and to finally to the mental levels -and designates observable milestones to determine one’s progress on the path. It marries the philosophy of Yoga with clear “how-to” instruction…

The Making of a Yoga Master: A Seeker’s Transformation

 

Integral Yoga

The practice of separate branches of yoga in our lives is known as integral yoga which creates harmony between body, mind, and emotions and stimulates the expression of creativity and the creative potential of people in everyday life.

We strive to make our studio at the Center of Massage Therapy to be a small temple to transmit the principles of integral yoga and making yoga a way of life.

LEARN MORE

CALL 303-777-1151 for Yoga Instruction at the Center of Massage Therapy in Cherry Creek district in Denver, Colorado.

 

Related Articles:

Origins of Yoga.

What is Yoga Nidra?

What are Master Tung’s Magic Points? – Acupuncture at The Center for Massage Therapy

What are Master Tung’s Magic Points? – Acupuncture at The Center for Massage Therapy

Acupuncture Styles

There are many different styles of Acupuncture that are practiced today. While Acupuncture originated in China approximately 3,000 years ago, the practice spread over the Asian continent and developed its own regional adaptations. Each of these Acupuncture styles differs in their theory and practice.

Master Tung became famous due to his ability to achieve rapid results with few needles. While many of the points used by Master Tung were on acupuncture meridians, they were not the standard points used by most acupuncturists.

READ MORE

 

Master Tung Style Acupuncture

Master Tung’s Acupuncture was originally a closely guarded oral tradition that was exclusively passed down within the Tung family. Master Tung Ching-Chang broke this tradition and accepted his first disciple outside the family in 1962 in Taipei, Taiwan, over 48 years ago.

Since then, Master Tung’s system has gained a tremendous amount of momentum and popularity. It is currently one of the most sought after and highly esteemed schools of acupuncture, characterized by its simplicity, ease of use, and great clinical efficacy.

READ MORE

 

Master Tung’s Magic Points with Susan Johnson L.Ac.

Susan Johnson has been studying Chinese Medicine since 1982. She is a well known teacher of Master Tung’s Magic Points, a potent system of acupuncture handed down as a treasured family secret for generations and made public by Master Tung Ching Chang.

 

Contact The Center for Neuromuscular Massage Therapy to learn about acupuncture and schedule an appointment.

Speak to Kalin Davidov; Neuromuscular Therapist, Licensed Massage Therapist, Licensed Acupuncturist and Yoga Teacher.

CALL 303-777-1151

What is a Myofascial Trigger Point?

What is a Myofascial Trigger Point?

Myofascial Trigger Point

Among physicians, various specialists might use trigger point therapy. These include physicians specializing in physical medicine and rehabilitation, family medicine, and orthopedics. Other health professionals, such as athletic trainers, occupational therapists, physiotherapists, acupuncturists, massage therapists and structural integrators use trigger points in their clinical work as well.

READ MORE

 

Trigger Point Tutorial

Trigger Points and Myofascial Pain Syndrome – A guide to the unfinished science of muscle pain, with reviews of every theory and self-treatment and therapy option.

 

Deep Tissue Massage

Deep tissue massage is also known as structural integration, myofascial release, neuromuscular therapy, trigger point therapy, and other terms. This type of massage focuses on the attachment to the bone at either end of the muscle, as well as treating the muscle belly.

 

Neuromuscular Therapy Massage

Center for Massage Therapy – Our therapists are trained to identify trigger points that may be the actual area of injury and a source or your pain. Using the hands, our massage therapists apply techniques that release the spasm and balance muscle tone in the injured area.

 

Our Denver massage therapists deliver expert neuromuscular therapy in our Cherry Creek clinic. Call 303-777-1151 for an appointment today!

What Is The Difference Between A Medical Massage And A Spa Massage?

What Is The Difference Between A Medical Massage And A Spa Massage?

Clinical Massage vs. Relaxation Massage

Clinical Massage – Treatment Intention : Problem-solution, “fixing” approach. Many assessments and systematic application of clinical massage techniques.

Relaxation Massage – Treatment Intention : Intuitive, nurturing approach. Creative selection of techniques. Can be mellow spa-like atmosphere, meditative, chatty and educational, or lively and invigorating, depending on client or patient needs.

Two other terms often arise in the process of distinguishing between medical massage and wellness massage. I primarily use clinical massage techniques, and approach my work with a clinical intention, in my medical massage practice, but I also take a clinical approach with some of my wellness clients. Similarly, I primarily use relaxation massage techniques in my wellness practice, but sometimes doctors prescribe massage for its relaxation benefits, so I sometimes use it in my medical practice.

View the table to clarify and elaborate on the differences between a medical massage and a wellness massage…

CLICK HERE

What are the Benefits of Medical Massage Therapy?

Therapeutic massage involves manipulation of the soft tissue structures of the body to prevent and alleviate pain, discomfort, muscle spasm and stress.

It also improves functioning of the circulatory, lymphatic and nervous systems and may improve the rate at which the body recovers from injury and illness.

 

LEARN ABOUT MEDICAL MASSAGES

Our Denver therapeutic massage therapists deliver expert medical massages at our Cherry Creek clinic. Call 303-777-1151 for an appointment today!

 

Clinical Massage - Medical Massages in Denver
 

What is a Medical Massage?

Medical Massage usually addresses some kind of dysfunction. I see quite a few patients who want massage for relief from headaches, neck pain, and TMJ pain. Low back and hip pain massage is also quite common. Some patients come because they have numbness and tingling in their fingers. Others experience no pain, but cannot turn their head or lift their arm. Many have multiple issues.

READ MORE

 

What are Modalities?

It is important to understand that the type of modality that is practiced, from Swedish to Myofacial Release, from Cranio Sacral to Proprioceptive Neuromuscular Facilitation, or from Trigger Point Therapy to Lymphatic Drainage…

READ MORE

 

Therapeutic massage increasingly is being prescribed by physicians to complement traditional medical treatment for illness, injury and pain.

Medical massage therapy reduces the heart rate and blood pressure, increases blood circulation and lymph flow, relaxes muscles, improves range of motion and increases serotonin and endorphins, enhancing medical treatment.

Also, health insurance companies, realizing the cost savings of massage, are more and more often covering the therapy when it is a prescribed aspect of treatment.

LEARN MORE

 

Center for Neuromuscular Massage Therapy Center for Neuromuscular Massage Therapy

Neuromuscular Massage Therapy, Physical Therapy, Yoga, Acupuncture. Visit us at 3955 East Exposition, Suite 320 ~ Denver, CO 80209.

CALL 303-777-1151

 

 

What is Yoga Nidra?

What is Yoga Nidra?

Yoga nidra or “yogic sleep” is a sleep-like state which yogis report to experience during their meditations. Yoga nidra, lucid sleeping is among the deepest possible states of relaxation while still maintaining full consciousness.

Yoga Nidra brings an incredible calmness, quietness and clarity.

In Yoga Nidra, you leave the Waking state,
go through the Dreaming state,
and into the Deep Sleep state,
yet remain fully awake.

It prevents stress and stress-related disorders by inducing deep physical, emotional and mental relaxation, by training the mind to remain calm and quiet and by rooting out the repressed desires and thoughts from the deeper realms of the mind.

READ MORE

 

Kalin Davidov at the Center for Massage Therapy will sometimes use Yoga Nidra in combination with accupuncture thus enhancing its effects.

Call 303-777-1151 to schedule your appointment.

Yoga, Acupuncture, Massage Therapy, Chinese Medicine and High Sports Performance by Kalin Davidov

Yoga, Acupuncture, Massage Therapy, Chinese Medicine and High Sports Performance by Kalin Davidov

Kalin Davidov has been practicing massage therapy for over 12 years. He is nationally certified, licensed in Washington DC and registered in Colorado. He is a certified Neuromuscular Therapist, Thai-Massage Therapist and Acupuncturist.

Kalin became familiar with Ayurvedic massage during his training in Ayurvedic medicine at Tilak Ayurvedic College, Pune, India and with Tuina massage during his current studies of Traditional Chinese Medicine at Colorado school of Traditional Chinese medicine.

Kalin has a background in professional sports. He has graduated from a sports university in Europe with a major in Physical education and High Sports Performance.

Kalin has been practicing, studying and teaching yoga for many years. He studied at Bihar school of yoga, Munger, India.

Yoga Instruction and Private Classes

Kalin earned his Master of Science in Traditional Chinese Medicine from the Colorado School of Traditional Chinese Medicine in April 2015. This three-year program consists of 2,850 hours of education including over 700 hours of clinical practice.

Kalin’s training includes adjunct therapies such as Acupuncture, Moxibustion, Chinese massage, Cupping, Plum Blossom, Auriculotherapy, and dietary and lifestyle recommendations.

Kalin Davidov is certified as a Diplomate in Acupuncture and Traditional Chinese Medicine by the National Certification Commission for Acupuncture and Oriental Medicine (NCCAOM) in April 2015. This includes certification in Clean Needle Technique and Chinese Herbology. He is a licensed acupuncturist in Colorado.

Call Kalin at the Center for Massage Therapy at 303-777-1151 to schedule your session.

Stretching Myths, Types of Stretching and Stretching Exercises

Stretching Myths, Types of Stretching and Stretching Exercises

Stretching, in its most basic form, is a natural and an instinctive activity. Stretching results in a feeling of increased muscle control, flexibility, and range of motion.

There are four different types of stretching: ballistic, dynamic, proprioceptive neuromuscular facilitation, and static stretching.

By performing slow controlled stretches through full range of motion, a person reduces risk of injury.

5 Stretching Myths
To stretch or not to stretch? That is the age old question. Here’s everything you need to forget about stretching, and everything you should know instead.

READ MORE

   

Stretching: What To Do and When To Do It
There are several variations of stretches to improve your range of motion. Why? Better range of motion means improved strength, which leads to speed and power.

READ MORE

   

Stretching Exercises
Stretching exercises and workouts. Learn from experts using this stretching exercise database filled with detailed instructions and video.

READ MORE

The distinguished team of massage therapists at the Center for Massage Therapy listens with sensitivity to your needs and provides caring and comprehensive clinical massage therapy for injury, stress management, relaxation, and sports.

To prevent future injury, we promote body awareness, flexibility, and strength. With the highest esteem, we honor our profession and relationships with our patients and fellow therapists.

Introductory special on your first one-hour session. Please call 303-777-1151 for your Denver massage appointment.

Massage Therapy Big Data and Does Your Health Insurance Cover Massages and Acupuncture?

Massage Therapy Big Data and Does Your Health Insurance Cover Massages and Acupuncture?

Massage Therapy Industry Data Fact Sheet

The following is a compilation of data gathered by the American Massage Therapy Association® (AMTA®) from U.S. government statistics, surveys of consumers and massage therapists and recent clinical studies on the efficacy of massage. These data provide an overview of the current state of the massage therapy profession, public and medical acceptance of the value of massage and increasing consumer usage of massage therapy in the U.S.

READ FULL ARTICLE

   

Does Your Health Insurance Cover Alternative Medicine?

When considering reimbursement, the Affordable Care Act mandates that insurers not discriminate against licensed health care providers, including those who practice alternative medicine, such as naturopaths, massage therapists and acupuncturists.

READ FULL ARTICLE

 

Massage Therapy Big Data

 

Center for Massage Therapy

Providing massage in Denver, Colorado since 1984, the Center Massage Therapy is a group of nationally certified massage therapists whose skills, advanced training, and integrity have helped grow our massage center to be one of the largest and best massage therapy clinics in Colorado.

The Center for Massage Therapy accepts SpaFinder gift cards and we also accept Health Flex Cards (Health Savings Accounts) because Massage Therapy is considered as a medical expense.

To learn more about massage therapy CALL 303-777-1151 or email massagecenterdenver@gmail.com

Body Weight Fitness and Training Exercises for Muscle Building

Body Weight Fitness and Training Exercises for Muscle Building

Body weight exercises are strength training exercises that do not require free weights… your own weight provides the resistance for the movement. Body movements such as push-ups, pull-ups, and sit-ups are some of the most common bodyweight exercises.

50 Bodyweight Exercises You Can Do Anywhere

Bodyweight exercises are a simple, effective way to improve balance, flexibility, and strength without machinery or extra equipment.

READ FULL ARTICLE

 

Is Bodyweight Training Effective for Building Muscle?

Bodyweight training is incredibly effective for building muscle. Some would even argue that it’s better than free weights.

READ FULL ARTICLE

 

Why I Believe Bodyweight Training is BEST

 

Combining bodyweight training & weight training for maximum benefit.

So, which is better, bodyweight exercise or weight training? The answer is neither is better.

In fact, often you will get more benefit if you use both approaches together.

44 Best Bodyweight Fitness and Training Exercises Ever! Time to get motivated!

Acupuncture Now Available!

Center for Massage Therapy

Please call us at 303-777-1151 to schedule your appointment.

At our massage center, we have dedicated ourselves to provide those in need of massage in Denver, CO with impeccable service in a comfortable and professional massage environment. Come and see why our massage therapy clinic was voted one of the Top 10 places in Denver to receive a massage by Citysearch – Best of Denver.

The Ancient Healing Art of Acupuncture

The Ancient Healing Art of Acupuncture

Acupuncture is a an ancient healing art, and a cornerstone of traditional Chinese medicine. Most people have a basic concept of acupuncture, and know that it involves inserting thin needles into the body. But there is so much more to explore. Let’s take a deeper look at this intriguing practice, which has anecdotally helped so many with pain relief, allergies, nausea, insomnia, and a wide range of other ailments.

It is an alternative method for caring for your body and improving your health which might look exotic and intimidating on the surface. Our objective here is to demystify it, and as you learn more about what acupressure is and how it works, you can decide if it is right for you.

An “acupuncture point” is a specific spot on the body located along one of the meridians (connected points across the anatomy which affect a specific organ,) which is focused on in acupuncture therapy. Acupuncture points tend to be located at the exact spot where a nerve enters a muscle, at the exact midpoint of a muscle, or at the enthesis where muscle joins with bone. There are hundreds of these points, all over the human body, each of them located and named over the course of centuries.

There are, in fact, are 400 of them, not counting bilateral points twice. And these points aren’t only treated with needles: acupuncture therapy can involve the application of pressure, heat, or even lasers. The purpose of stimulating these points, in traditional Chinese medicine, is to bring the patient relief from their symptoms by rebalancing the human body’s complex energies. This is a theory based on the holistic paradigm of Chinese health practices, and has no analogue in Western medicine.

Like with yoga and other forms of traditional health practices, there has been an increasing interest in acupuncture as more and more people in the Western world become inclined to seek out alternative, holistic methods of treating various conditions, without recourse to pharmaceutical or other mainstream medical treatment. Also, acupuncture is often used as an adjunct to other forms of treatment. For instance, it is commonly used in addition to physical therapy in rehabilitating injuries, or along with deep-tissue massage for stress relief.

Looking at the historical context for the use of acupuncture, we see that it has long been used to treat expectant mothers, with the intent of ensuring babies are born strong, happy, healthy, with strong immune systems and resistance to germs, and with minimal transmission of toxins from mother to child. Modern practitioners of acupuncture often recommend monthly treatments during pregnancy to support optimal health of the mother and developing baby. Along with prenatal massage, it can be a great help in preparation for labor.

At the Center for Neuromuscular Massage Therapy, we strive to offer a wide range of holistic treatment options, so that you have access to excellent, highly-trained practitioners in a variety of fields and can decide what style and combination of treatment works best for you.

Please call us at 303-777-1151 or contact us for more information.

Yin Yang

Center for Massage Therapy in Denver Provides Professional and Comfortable Massage Environment

At the Center for Massage Therapy, we have dedicated ourselves to provide those in need of massage in Denver, Colorado with impeccable service in a comfortable and professional massage environment. Come and see why our massage therapy clinic was voted one of the Top 10 places in Denver to receive a massage by Citysearch – Best of Denver.

Read About Our Massage and Physical Therapists

Contact Center for Massage Therapy : CALL 303-777-1151 to make an appointment.

Acupuncture Now Available! Schedule now and save $25!

Acupuncture Now Available! Schedule now and save $25!

Please call us at 303-777-1151 to schedule your appointment.

You have Successfully Subscribed!

Pin It on Pinterest