Fitness

FAQ
Fitness refers to what your body can do, including your muscle strength and how quickly you can move. Exercise, on the other hand, refers to organized and intentional physical activity, such as brisk walking, cycling, strength training, and stretching, all of which can improve your fitness level.
Exercise is a healthy habit. Its short-term benefits include a brighter mood and better sleep. In the long term, regular exercise can lower your risk of chronic diseases such as dementia, type 2 diabetes, heart disease, and cancer.
The five components of physical fitness are: cardiorespiratory fitness (measured by VO2 max), musculoskeletal fitness (including muscle strength), flexibility, balance, and speed.

Kara Andrew, RDN, LDN
Medical Reviewer
Kara Andrew, RDN, LDN, is the director of health promotion for Memorial Hospital in Carthage, Illinois. She is also licensed as an exercise physiologist and certified in lifestyle medicine by the American College of Lifestyle Medicine. Her experience includes corporate wellness, teaching for the American College of Sports Medicine, sports nutrition, weight management, integrative medicine, oncology support, and dialysis.
She earned her master's in exercise and nutrition science at Lipscomb University.
Andrew has served as a president and board member of the Nashville Academy of Nutrition and Dietetics. She was recently elected a co-chair of the fitness and medicine group in the American College of Lifestyle Medicine.

Justin Laube, MD
Medical Reviewer
Justin Laube, MD, is a board-certified integrative and internal medicine physician, a teacher, and a consultant with extensive expertise in integrative health, medical education, and trauma healing.
He graduated with a bachelor's in biology from the University of Wisconsin and a medical degree from the University of Minnesota Medical School. During medical school, he completed a graduate certificate in integrative therapies and healing practices through the Earl E. Bakken Center for Spirituality & Healing. He completed his three-year residency training in internal medicine at the University of California in Los Angeles on the primary care track and a two-year fellowship in integrative East-West primary care at the UCLA Health Center for East-West Medicine.
He is currently taking a multiyear personal and professional sabbatical to explore the relationship between childhood trauma, disease, and the processes of healing. He is developing a clinical practice for patients with complex trauma, as well as for others going through significant life transitions. He is working on a book distilling the insights from his sabbatical, teaching, and leading retreats on trauma, integrative health, mindfulness, and well-being for health professionals, students, and the community.
Previously, Dr. Laube was an assistant clinical professor at the UCLA Health Center for East-West Medicine and the David Geffen School of Medicine at UCLA, where he provided primary care and integrative East-West medical consultations. As part of the faculty, he completed a medical education fellowship and received a certificate in innovation in curriculum design and evaluation. He was the fellowship director at the Center for East-West Medicine and led courses for physician fellows, residents, and medical students.

Joseph Hribick, PT, DPT, COMT, FAAOMPT
Medical Reviewer
Dr. Joseph Hribick is a clinical assistant professor of physical therapy at Lebanon Valley College in Pennsylvania. He's an alumnus of Lebanon Valley College and received his bachelor of health science (BS) in 2009 and doctor of physical therapy (DPT) in 2011 as the valedictorian of his graduating class. He earned his certified manual physical therapist (CMPT) designation in 2017 and his certified orthopedic manual therapist (COMT) designation from NAIOMT in 2020.
In 2021, he earned the designation as a fellow of the American Academy of Orthopedic Manual Physical Therapy. In 2020, Hribick was the recipient of the Nevelyn J. Knisley Award for Teaching Excellence by Lebanon Valley College.
In addition to his full-time faculty position at Lebanon Valley College, he teaches orthopedic and manual therapy professional development courses to physical therapists across the United States. Hribick also maintains an active clinical practice treating patients in an outpatient private physical therapy practice.
He has presented his research in orthopedic physical therapy practice and reducing fall risk in the older adult population on a national level. He has been cited in multiple health and wellness publications as a content expert and serves as a subject matter expert for a national physical therapy licensure examination preparation company.

Lynn Grieger, RDN, CDCES
Medical Reviewer
Lynn Grieger is a registered dietitian-nutritionist, certified diabetes care and education specialist, certified personal trainer, and certified health and wellness coach. She completed requirements to become a registered dietitian at Valparaiso University in 1987 and completed a dietetic internship at Ingalls Memorial Hospital in Harvey, Illinois, in 1988.
Lynn brings her expertise in nutrition, exercise, and behavior change to her work in helping people reach their individual health and fitness goals. In addition to writing for Everyday Health, she has also written for websites and publications like Food and Health Communications, Today's Dietitian, iVillage.com, and Rodale Press. She has a passion for healthy, nutrient-dense, great-tasting food and for being outdoors as much as possible — she can often be found running or hiking, and has completed a marathon in every state.

Jennifer Payne, MD
Medical Reviewer
Jennifer Payne, MD, is a physician at Penn Medicine Lancaster General Health.
She earned her bachelor's from the University of St. Thomas, majoring in biochemistry and minoring in theology. She was the first service learning assistant for the service learning program and did extensive volunteer work with Open Arms of Minnesota during this time, including building a library on multiple sclerosis information. She obtained her MD from the Georgetown University School of Medicine, where she was part of the first class to run the Hoya Clinic for people without housing. She also completed an elective in medical writing and editing, working with American Family Physician magazine. Dr. Payne completed her residency in family medicine at Lancaster General Hospital and a primary care sports medicine fellowship at Wellspan Health in York, Pennsylvania.
She has served on the board of the Mid-Atlantic Regional Chapter of the American College of Sports Medicine and assisted in obtaining speakers and clinical case studies for the physician portion of the conference.
She enjoys reading, all sports (particularly Olympic weightlifting), walking her dog, and spending time with her husband, sons, and their extended family.
Luis Manrique-Trujillo, MD
Medical Reviewer

Allison M. Fout, PA-C
Medical Reviewer
Allison M. Fout, PA-C, has 20 years of experience as a Physician Assistant with a career rooted in orthopedic care. Since 2015, she has been a provider at Excelsior Orthopaedics in Buffalo, New York, specializing in sports medicine, joint replacements, fracture care, and a wide range of musculoskeletal conditions.
She works with patients across multiple age groups — from young athletes to aging adults — helping them recover function, reduce pain, and return to the activities they enjoy.
Her dedication to patient-centered care earns the trust of both her patients and colleagues. Beyond the clinic and operating room, she's involved in education and mentorship. She serves as a mentor to fellow clinicians and students alike and works as an adjunct instructor of orthopedics for the PA program at Daemen University, guiding and empowering the next generation of healthcare professionals as they develop their technical skills, knowledge, and confidence.

Samuel Mackenzie, MD, PhD
Medical Reviewer
Samuel Mackenzie, MD, PhD, is an Assistant Professor of Child Neurology, Neuromuscular Disease, and Neuroscience at University of Rochester Medical Center. He completed his undergraduate studies at Cornell University before earning a master's degree in exercise science at the University of Delaware and his MD and PhD degrees at SUNY Upstate Medical University. He completed residency in child neurology at the University of Michigan and fellowship in neuromuscular medicine at The Ohio State University and Nationwide Children's Hospital.
Dr. Mackenzie's research interests broadly involve developing new ways to restore motor function in patients with neurological disease and developing gene-based treatments for patients with neuromuscular conditions. He also has an interest in health policy and advocacy, specifically as these relate to how scientific discoveries can best be leveraged for societal good in an equitable and cost-effective manner.

Chelsea Vinas, MS, LMFT
Medical Reviewer
Chelsea Vinas is a licensed psychotherapist who has a decade of experience working with individuals, families, and couples living with anxiety, depression, trauma, and those experiencing life transitions.
She is a first-gen Latina currently working for Lyra Health, where she can help employees and their families stay emotionally healthy at work and at home.
Chelsea has varied experience in mental health, including working in national and international prisons, with children who have autism, and running her own private practice.

Scott Haak, PT, DPT, MTC, CSCS
Medical Reviewer
Scott Haak, PT, DPT, has been a member of the Mayo Clinic staff since 2000. Dr. Haak serves as faculty for the Sports Medicine Fellowship program at Mayo Clinic Florida. He is certified by the NSCA (National Strength and Conditioning Association) as a CSCS (Certified Strength and Conditioning Specialist), is a Certified USA Weightlifting Coach and Certified USA Football Coach, and possesses a MTC (Manual Therapy Certification) from the University of St. Augustine for Health Sciences.
Haak is an exercise enthusiast and enjoys running, weightlifting, and sports performance training. He is the president and director of coaching of a youth tackle football organization, JDL Providence Football, and currently coaches high school football and weight lifting.

Heather Jeffcoat, PT, DPT
Medical Reviewer
Heather Jeffcoat, PT, DPT, is a doctor of physical therapy and the founder of Femina Physical Therapy and Fusion Wellness & Physical Therapy, both of which focus on pelvic health and whole-body orthopedic care.
With more than 20 years of clinical experience, Dr. Jeffcoat is a leading expert in the treatment of sexual pain and pelvic floor dysfunction, and her Los Angeles (Beverly Hills, Pasadena, Sherman Oaks) and Atlanta-based clinics draw patients from around the world.
She is the author of Sex Without Pain: A Self-Treatment Guide to the Sex Life You Deserve, which is widely used by both patients and healthcare professionals. Jeffcoat regularly lectures internationally on female sexual health, pelvic pain, and interdisciplinary care, and she develops continuing education courses for physical therapists and other providers.
Jeffcoat served as president of the Academy of Pelvic Health Physical Therapy from 2021 to 2024, and held multiple leadership positions with the International Pelvic Pain Society from 2014 to 2023, including acting on their board of directors.
Her patient-centered, integrative approach emphasizes functional recovery and empowerment for those experiencing painful sex, endometriosis, postpartum trauma, menopause-related incontinence or pain, and other complex pelvic and chronic pain conditions. She has created multiple programs, including Birth Prep 101, helping hundreds of women achieve the birth and postpartum recovery support they need.
Her passion extends beyond the clinic walls, as she also founded and runs a 501(c)3, Empower Health Fund, a nonprofit dedicated to providing no cost services to low-income and marginalized populations with pelvic health conditions.
She has been a speaker at the following:
- World Congress on Abdominal and Pelvic Pain, Cartagena, Colombia, Post-Conference Course: "Chronic Pelvic Pain Evaluation and Management Strategies," 2024
- American Urogynecologic Association, Advanced Practice, Physical Therapy, and Allied Health Bootcamp: "Pelvic Pain and Sexual Dysfunction Related to PFDs" (AUGS Preconference Course), 2016
- American Urogynecologic Association, Seattle, "Pathoanatomy and Patient Presentations in Sexual Pain Syndromes," co-presented with Nazema Siddiqui, MD, 2016
- UCLA Urogynecology and MIGS Lecture Series, "Continence and Pain Mechanisms Beyond the Pelvic Floor," 2024
- PelviCon National Conference, Atlanta, "The Female Orgasm and Differential Diagnosis of Vaginismus and Vulvodynia," 2022
- Invited lecturer: Pelvic health education, Reproductive Health Access Project, CSU Fullerton, 2024
- Expert panel speaker, Menopause Monologues: The Hottest Show In Town, Hollywood, California, 2025
Course developer and instructor, Female Sexual Function, Dysfunction & Pain, United States, Istanbul, Middle East:
- Sex Therapy for Transgender and Nonbinary Clients, Center for Healthy Sex
- Cyclist’s Syndrome–Pudendal Neuralgia, Beijing (Chinese Olympic Committee)
- Multiple CE webinars and in-person labs across North America
Community Education:
- Creator and host of multiple events in California, Girls’ Night Out: Better Sexual and Pelvic Health
- Guest speaker, LA LGBTQ Center, Duke University SoCal Women’s Group, and Endo Day

Aubrey Bailey, PT, DPT, CF-L1
Medical Reviewer
Aubrey Bailey is a doctor of physical therapy with a specialization in hand therapy based in Virginia.

Grant Chu, MD, MS, MBA, FACP
Medical Reviewer
Grant Chu, MD, is an associate clinical professor at the David Geffen School of Medicine at UCLA. Dr. Chu is also associate director of inpatient East-West consult services at the UCLA Health hospitals.
He's board-certified in internal medicine by the American Board of Internal Medicine and is a diplomate of the National Certification Board for Acupuncture and Herbal Medicine (formerly the National Certification Commission for Acupuncture and Oriental Medicine).
He received a bachelor's degree in neuroscience from Brown University, where he also earned his medical degree. He has a master's in acupuncture and oriental medicine from South Baylo University and a master's in business administration from the University of Illinois at Urbana-Champaign.
He completed his residency in internal medicine at the University of California in Los Angeles and a fellowship at the Center for East-West Medicine at UCLA. He has held academic appointments at the University of California in Irvine and the University of Queensland in Australia.

Kristina D. Carter, PharmD
Medical Reviewer
Kristina D. Carter, PharmD, is a clinical pharmacist and freelance health writer who currently works in a managed care setting, performing quality audits on utilization management case reviews for the pharmacy team. She has over 20 years of experience and has worked in several pharmacy practice settings, including at a community pharmacy as well as in ambulatory care, senior care, and pharmacy operations.
She received her doctor of pharmacy degree from Xavier University of Louisiana College of Pharmacy and her master's of business administration and health administration from Georgia State University Robinson College of Business. She is an American Council on Exercise–certified health coach, group fitness instructor, senior fitness specialist, and weight management specialist. She is also a registered pharmacist, licensed in Georgia, Indiana, and Tennessee.
Dr. Carter enjoys exploring new restaurants with family and friends, walking along city trails, and watching action movies and college sports.

Reyna Franco, RDN
Medical Reviewer
Reyna Franco, RDN, is a New York City–based dietitian-nutritionist, certified specialist in sports dietetics, and certified personal trainer. She is a diplomate of the American College of Lifestyle Medicine and has a master's degree in nutrition and exercise physiology from Columbia University.
In her private practice, she provides medical nutrition therapy for weight management, sports nutrition, diabetes, cardiac disease, renal disease, gastrointestinal disorders, cancer, food allergies, eating disorders, and childhood nutrition. To serve her diverse patients, she demonstrates cultural sensitivity and knowledge of customary food practices. She applies the tenets of lifestyle medicine to reduce the risk of chronic disease and improve health outcomes for her patients.
Franco is also a corporate wellness consultant who conducts wellness counseling and seminars for organizations of every size. She taught sports nutrition to medical students at the Albert Einstein College of Medicine, taught life cycle nutrition and nutrition counseling to undergraduate students at LaGuardia Community College, and precepts nutrition students and interns. She created the sports nutrition rotation for the New York Distance Dietetic Internship program.
She is the chair of the American College of Lifestyle Medicine's Registered Dietitian-Nutritionist Member Interest Group. She is also the treasurer and secretary of the New York State Academy of Nutrition and Dietetics, having previously served in many other leadership roles for the organization, including as past president, awards committee chair, and grant committee chair, among others. She is active in the local Greater New York Dietetic Association and Long Island Academy of Nutrition and Dietetics, too.

Kara Smythe, MD
Medical Reviewer
Kara Smythe, MD, has been working in sexual and reproductive health for over 10 years. Dr. Smythe is a board-certified fellow of the American College of Obstetricians and Gynecologists, and her interests include improving maternal health, ensuring access to contraception, and promoting sexual health.
She graduated magna cum laude from Florida International University with a bachelor's degree in biology and earned her medical degree from St. George’s University in Grenada. She completed her residency in obstetrics and gynecology at the SUNY Downstate Medical Center in Brooklyn, New York. She worked in Maine for six years, where she had the privilege of caring for an underserved population.
Smythe is also passionate about the ways that public health policies shape individual health outcomes. She has a master’s degree in population health from University College London and recently completed a social science research methods master's degree at Cardiff University. She is currently working on her PhD in medical sociology. Her research examines people's experiences of accessing, using, and discontinuing long-acting reversible contraception.
When she’s not working, Smythe enjoys dancing, photography, and spending time with her family and her cat, Finnegan.

Sylvia E. Klinger, DBA, MS, RD, CPT
Medical Reviewer
Sylvia Klinger, DBA, MS, RD, CPT, is an internationally recognized nutrition expert who is relentlessly passionate about helping people fall in love with creating and enjoying delicious, safe, and nutritious foods.
As a food and nutrition communications professional, Dr. Klinger is a global nutrition professor, award-winning author, and the founder of Hispanic Food Communications.
She is on the board at Global Rise to build a formal community nutrition program as part of an ambitious initiative to create a regenerative food system in Uganda in partnership with tribal and community leaders. This program included an extensive training session on food safety and sanitation that displayed cultural sensitivity and various communication strategies and incentives to spread these important food safety and sanitation messages into the communities.
Her Hispanic background fuels her passion for nutrition, leading her to empower and encourage those in her community through the foods they enjoy in their kitchens. At the same time, she understands everyone’s needs are different and seeks to individualize nutrition and exercise to best fit each person and their journey to a happy, safe, and healthy life.
Her latest book, The Little Book of Simple Eating, was published in 2018 in both Spanish and English.
In her spare time, Klinger explores food and culture all over the world with her family, realizing the power a healthy lifestyle has to keep people together.

Natalie Sampson, PT, DPT
Medical Reviewer
- Caspersen CJ et al. Physical Activity, Exercise, and Physical Fitness: Definitions and Distinctions for Health-Related Research. Public Health Reports. March–April 1985.
- Health Benefits of Exercise and Physical Activity. National Institute on Aging.
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