Arja Häkkinen

Arja Häkkinen
University of Jyväskylä | JYU · Faculty of Sport and Health Sciences

PhD

About

359
Publications
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Publications

Publications (359)
Preprint
Background The Kerlan-Jobe Orthopaedic Clinic Shoulder and Elbow score (KJOC) is developed to evaluate the shoulder and elbow function in overhead athletes. To date, the score has not been adapted into Finnish language. The aim of this study was to perform a cross-cultural adaptation of the Kerlan-Jobe Orthopaedic Clinic Shoulder and Elbow score (K...
Article
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Objective: Adults with degenerative spinal deformity (ASD) have lower health-related quality of life (HRQL) compared to the general population. Applying Rasch Measurement Theory (RMT), this study tested the revised Scoliosis Research Society-22 (SRS-22r) HRQL instrument among symptomatic adult patients with degenerative spinal disorders and varyin...
Article
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Effects of eccentric (ECC) versus concentric (CON) strength training of the upper body performed twice a week for 10 weeks followed by detraining for five weeks on maximal force, muscle activation, muscle mass and serum hormone concentrations were investigated in young women (n = 11 and n = 12). One-repetition bench press (1RM), maximal isometric f...
Article
Objectives To assess whether (i) high-intensity resistance training (RT) leads to increased muscle strength compared to low-intensity RT in patients with knee osteoarthritis (OA); and (ii) RT with vitamin D supplementation leads to increased muscle strength compared to placebo in a subgroup with vitamin D deficiency. Design Randomized controlled t...
Article
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Healthy lifestyle behaviors including physical activity (PA) have been recognized to contribute positively to mental health. Most of the evidence on relationship between PA and mental health relies on self-reported PA results. Device-based measures on PA or sedentary behavior (SB) are less frequently used in mental health research. The present stud...
Article
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Introduction Urinary incontinence (UI) during pregnancy is a common health problem. Vaginal delivery in particular affects the pelvic floor and increases the risk of pelvic floor dysfunctions. This prospective cohort study was conducted to investigate the incidence of UI during pregnancy and three months postpartum and determine the risk factors un...
Article
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Background Neck pain has been associated with weaker neck muscle strength and decreased cervical spine range of motion. However, whether neck muscle strength or cervical spine mobility predict later neck disability has not been demonstrated. In this 16-year prospective study, we investigated whether neck muscle strength and cervical spine mobility...
Article
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Study design: Prospective, follow-up study. Objective: We aim to compare the rate of revisions for ASD after LSF surgery between patients with IS and DLSD. Summary of background data: ASD is a major reason for late reoperations after LSF surgery. Several risk factors are linked to the progression of ASD, but the understanding of the underlying...
Article
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Background: Conservative therapies are typically offered to individuals who experience mild or intermittent symptoms of carpal tunnel syndrome (CTS) or postoperatively to subjects who have undergone carpal tunnel release. Although long-term studies report mostly positive results for carpal tunnel release, knowledge on the need for conservative tre...
Article
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There is a lack of validated instruments measuring motivation for physical activity (RM4-FM) in the Finnish language. The study examined the translated RM4-FM instrument's psychometric properties in a sample of healthy, older Finnish adults. RM4-FM was translated and linguistically validated adhering to published guidelines. 65-75-year olds (n=102)...
Preprint
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The purpose of the present study was to investigate stress, anabolic and catabolic hormonal levels and their association with interleukin 6 (IL-6) cytokine in patients undergoing lumbar spine fusion (LSF) surgery. Blood samples were collected preoperatively, and at 1, 3, 42 and 90 days postoperatively (POD) from 49 LSF patients with a mean (SD) age...
Article
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The aim of the study was to examine whether sports participation (SP), engagement in competitive sports (CS), and the type of sport undertaken at the age of 12 are associated with the physical and mental components of health-related quality of life (HRQoL) in young adulthood. The data were collected using questionnaires prior to a compulsory milita...
Article
Aim To evaluate the activity of knee stabilizing muscles while using custom-made biomechanical footwear (BF) and to compare it when walking barefoot and with a knee brace (Unloader®). Methods Seventeen healthy working-aged (mean age: 28 years; standard deviation: 8 years) individuals participated. The knee brace was worn on the right knee and BF i...
Article
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Study Design Prospective follow-up study. Objectives We aimed to assess the effect of lumbar spine fusion (LSF) on disability, health-related quality of life and mortality in a 5-year follow-up, and to compare these results with the general population. Methods 523 consecutive LSF operations were included in a prospective follow-up. Disability was...
Article
Study design: Prospective follow-up study. Objective: The aim of this study was to assess if depressive symptoms change the outcome of lumbar spine fusion (LSF) surgery at a 5-year follow-up. Summary of background data: Previous reports of the influence of depressive symptoms on the results of spine surgery are controversial, but the patient c...
Article
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Background: The Boston Carpal Tunnel Questionnaire (BCTQ) and its shorter version, the Six-Item Carpal Tunnel Symptoms Scale (CTS-6), are widely used for assessing function and/or symptoms in patients with carpal tunnel syndrome. This study examined the structural validity of the BCTQ and CTS-6 among patients who had undergone surgery for treatmen...
Article
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Background: There is growing evidence on positive effects of physical activity (PA) on mental health. However, the focus of previous research on this relationship has typically been on mental health from the perspective of mental health problems rather than from the perspective of mental wellbeing. Further, previous research has commonly focused r...
Article
This study investigated acute hemodynamic, plasma volume and immunological responses to four loading protocols: sauna only, and sauna after endurance, strength or combined endurance and strength exercise. Twenty-seven healthy, slightly prehypertensive men (age 32.7±6.9 years) were measured at PRE, MID (after exercise), POST, POST30min and POST24h....
Preprint
Full-text available
Background: The Boston Carpal Tunnel Questionnaire (BCTQ) and its shorter version Six-Item Carpal Tunnel Symptoms Scale (CTS-6) are widely used for assessing function and/or symptoms in patients with carpal tunnel syndrome. The present study examined the structural validity of the BCTQ and CTS-6 among patients who had undergone surgery for treatmen...
Preprint
Full-text available
Background: The Boston Carpal Tunnel Questionnaire (BCTQ) and its shorter version, the Six-Item Carpal Tunnel Symptoms Scale (CTS-6), are widely used for assessing function and/or symptoms in patients with carpal tunnel syndrome. This study examined the structural validity of the BCTQ and CTS-6 among patients who had undergone surgery for treatment...
Article
Materials and methods: Three months postoperatively, 98 patients were randomized either to the exercise group (EG), with a progressive 12-month home-based exercise program, or to usual care group (UCG), with one guidance session for light home-exercises. Maximal trunk muscle strength was measured by a strain-gauge dynamometer and trunk extensor en...
Article
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Background: Despite numerous studies providing evidence for positive effects of physical activity and physical fitness, evidence for association between physical fitness and health-related quality of life (HRQoL) in young adults is limited. The aim of the present cross-sectional study was to investigate the association of cardiorespiratory and mus...
Article
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Objective: To conduct a secondary analysis to study the effects that four months of aquatic resistance training has on self-assessed symptoms and quality of life in postmenopausal women with mild knee osteoarthritis (OA), after the intervention and after a 12-month follow-up period. Methods: 87 postmenopausal volunteer women, aged 60-68 years, w...
Article
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Objective To compare the effects of a 12-month home-based exercise program to usual care in patients after arthroscopic capsulolabral repair of the shoulder. Design Randomized controlled trial. Setting Outpatient physical and rehabilitation medicine clinic. Subjects Forty-five patients (mean age: 35 years; standard deviation (SD): 10 years) who...
Article
Introduction The construct validity of the Disabilities of the Arm, Shoulder and Hand questionnaire (DASH) has previously been questioned. The purpose of this study was to evaluate the measurement properties of the Finnish version of the DASH for assessing disability in patients with hand complaints using Rasch Measurement Theory. Methods A cohort...
Preprint
Full-text available
Background There is a lack of properly validated instruments measuring motivation for physical activity in the Finnish language. The study aimed to translate the Motivation for Physical Activity (RM4-FM) instrument into Finnish and examine its psychometric properties in a sample of healthy, older Finnish adults. Methods The RM4-FM was translated an...
Article
Full-text available
Background Reductions in muscle strength and poor balance may lead to mobility limitations in older age. Aims We assessed the effects of long-term once-weekly strength and balance training (SBT) on muscle strength and physical functioning in a community-based sample of older adults. Methods 182 individuals [130 women and 52 men, mean age 80 (SD ±...
Article
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Background Low back pain (LBP) is the number one cause of disability globally. LBP is a symptom associated with biological, psychological and social factors, and serious causes for pain are very rare. Unhelpful beliefs about LBP and inappropriate imaging are common. Practitioners report pressure from patients to provide inappropriate imaging. A rec...
Poster
Full-text available
Pregnancy and childbirth are known risk factors for pelvic floor dysfunction. During pregancy approximately 30-60% of women experience urinary incontinence.. After birth there is spontaneous remission, but prevalence of urinary incontinence after vaginal delivery is ca. 21%. Urinary incontinence at three months post partum is a risk factor for pers...
Poster
Full-text available
The aim of the present study is to investigate changes in serum ACTH, cortisol, GH, and IGF-1, SHBG and testosterone concentrations during the acute postoperative trauma and tissue repair process induced by instrumented lumbar spine fusion (LFS). Blood samples were obtained from the patients pre- and postoperatively at the day of surgery, after the...
Poster
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The present study aims to investigate whether non-optional alignment in GAP or SRS-Schwab scores after adult spinal deformity surgery relates to mechanical complications and clinical outcome after ASD surgery. Based on the findings, the authors conclude that both two studied radiograph-based ASD scores (GAP and SRS-Schwab) recognizes postoperative...
Conference Paper
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Tausta: Liikunnalla tiedetään olevan myönteisiä vaikutuksia fyysisen hyvinvoinnin lisäksi myös mielen hyvinvointiin. Erilaisilla liikuntainterventioilla on siten mahdollisuus edistää väestön mielenterveyttä. Jotta osaamme kohdistaa oikeanlaisia interventioita oikealle kohderyhmälle, tarvitsemme tietoa fyysisen passiivisuuden syistä erityisesti siin...
Article
Rissanen, JA, Häkkinen, A, Laukkanen, J, Kraemer, WJ, and Häkkinen, K. Acute neuromuscular and hormonal responses to different exercise loadings followed by a sauna. J Strength Cond Res XX(X): 000-000, 2019-The purpose of this study was to investigate acute responses of endurance (E + SA), strength (S + SA), and combined endurance and strength exer...
Conference Paper
Background Exercise therapy is the cornerstone of knee osteoarthritis (OA) management. In particular muscle strengthening exercise, targeting the characteristic loss of muscle strength present in knee OA, is a key factor for the beneficial effects reported for exercise therapy. The optimal training intensity for resistance training in patients with...
Article
Full-text available
Background and aims: The Boston Carpal Tunnel Questionnaire is the most commonly used outcome measure in the assessment of carpal tunnel syndrome. The purpose of this study was to translate the original Boston Carpal Tunnel Questionnaire into Finnish and validate its psychometric properties. Materials and methods: We translated and culturally ad...
Article
The aim of the present study was to examine how combined strength and endurance training in the morning and evening influences the adaptations in strength and endurance performance, perception of time management, psychological well-being and sleep. The combined training period lasted for 24 weeks and the participants were divided into the morning t...
Article
Full-text available
Objectives To adapt the Houghton scale into Finnish and to assess its psychometric properties. Methods The study used translation and backtranslation and repeated surveys. These were assessed: convergent validity (Spearman correlation), floor-and ceiling effects, reliability (intraclass correlation coefficient), and construct validity (explorator...
Conference Paper
Co-authors: Joonas Rissanen, Jari Laukkanen, Keijo Häkkinen Introduction: We investigated acute effects of sauna bathing alone (SA) or endurance (E+SA), strength (S+SA) and combined exercise (C+SA) loadings followed by sauna on neuromuscular performance and serum hormone concentrations.
Article
Background and aims:: Adult spinal deformity surgery has increased with the aging population and modern surgical approaches, although it has high complication and reoperation rates. The permanence of radiographic correction, mechanical complications, predictive factors for poor patient-reported outcomes, and patient satisfaction were analyzed. Ma...
Conference Paper
Full-text available
The Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) is a widely used patient-reported outcome measure to evaluate pain, stiffness and physical function of patients with osteoarthritis of hip, knee or ankle. The WOMAC has been used also for patients after foot and ankle surgery, yet it has not been validated for this purpose....
Article
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Abstract Purpose: The aim of this study was to investigate the changes in trunk muscle strength 12 months after LSF compared to preoperative strength. Materials and methods: A total of 194 patients (mean age 61 [SD 21] years) who underwent LSF participated in this prospective longitudinal study. The participants had physical measurements before...
Article
Study design: This was a cross-sectional, observational study. Objective: The main objectives of this study were to observe the prevalence of a true L6 among patients with symptomatic adult spinal degeneration, and to evaluate similarities of their radiographic spinopelvic parameters to L5 patients. Summary of background data: Spinopelvic para...
Article
Full-text available
Background: The Knee Injury and Osteoarthritis Outcome Score (KOOS) is a commonly used knee assessment and outcome tool in both clinical work and research. However, it has not been formally translated and validated in Finnish. The purpose of this study was to translate and culturally adapt the KOOS questionnaire into Finnish and to determine its v...
Poster
Full-text available
There is a growing body of evidence that higher level of physical activity is associated with a better state of mental health. Less is known about the relationships between youth competitive sports and mental health in the adulthood. The aim of the study was to examine whether retrospectively assessed sports participation (SP) and competitive sport...
Research
Full-text available
Finnish summary of the findings of the published paper "Appelqvist-Schmidlechner K, Vaara J, Häkkinen A, Vasankari T, Mäkinen J, Mäntysaari M, Kyröläinen H. (2017). Relationships between youth sports participa-tion and mental health in young adulthood among Finnish males. American Journal of Health Pro-motion. First Published December 21, 2017"
Article
Purpose: To examine whether retrospectively assessed sports participation (SP) and competitive sports (CS) at the age of 12 years is associated with mental health and health behavior in young adulthood among males. Design: A cross-sectional study using self-administered questionnaires. Setting: Conducted prior to compulsory military refresher...
Conference Paper
Full-text available
Scoliosis Research Society questionnaire version 30 (SRS-30) has originally been developed to measure disability and health-related quality of life in patients with adolescent idiopathic scoliosis but it has proven valid also in adults with degenerative spinal disease. Degenerative spine disease has many phases and manifestations including disc deg...
Conference Paper
Full-text available
The Depression Scale (DEPS) is a patient-reported outcome instrument developed to recognize depressive symptoms. This study measured the psychometric properties of the DEPS among patients with degenerative spinal disease. Altogether 637 patients were included in the analysis. Main research question was whether the DEPS would meet pertinent psychome...
Conference Paper
Full-text available
The Lower extremity functional scale (LEFS) is a widely used patient-reported outcome instrument. This study further investigated the measurement properties of the Finnish version of the LEFS. Altogether 182 patients who had undergone foot and ankle surgery for various reasons and had completed the LEFS were included to analyze construct validity,...
Conference Paper
Full-text available
Aim: The Oswestry disability index (ODI) is a 10-item scale designed to measure the disability related to lower back pain. We aimed to study the psychometric properties of the Finnish version of the ODI using Rasch Measurement analytic techniques with the RUMM2030 software. Methods: ODI data was derived from 637 adult patients who suffered from spi...
Poster
Full-text available
Jalkateräkirurgia on yksi ortopedian osa-alue, joka keskittyy hoitamaan jalkaterän murtumia ja virheasentoja, jänteiden sairauksia ja vammoja sekä hermopinteitä. Jalkateräkirurgit pyrkivät yhä enemmän kartoittamaan hoidon vaikuttavuutta. Hyödyttömistä hoitomenetelmistä tulisi päästä eroon. Systemaattista tiedonkeräystä potilaan kokemasta hoidon hyö...
Article
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OBJECTIVES: Major amputation may be required when limb-sparing surgery is not possible for musculoskeletal tumors, or has failed. The authors aimed to assess the function and health-related quality of life (HRQoL) after major lower extremity amputation due to musculoskeletal tumors. METHODS: Thirteen non-consecutive adult patients (two men and 11...
Conference Paper
Full-text available
OBJECTIVES: Lower Extremity Functional Scale (LEFS) is a widely used 20-item patient-reported outcome instrument with five response categories. The purpose of this study was to investigate the measurement properties of the Finnish version of the LEFS among foot and ankle patients and refine the scale to measure more accurately that what matters to...
Conference Paper
Full-text available
OBJECTIVES: The Prosthesis evaluation questionnaire (PEQ) is used to assess patient-reported prosthesis-related quality of life. PEQ mobility section consists of 13 items. This study assessed the properties of the original mobility section of the Finnish version of the PEQ instrument on a visual analog scale (VAS) and its modified version with five...
Article
Full-text available
Objective: To study the effectiveness of a 12-month exercise therapy on kinesiophobia and physical activity in patients with spondylolisthesis after lumbar spine fusion. Design: Randomized controlled trial. Subjects: Patients (n = 98) with spondylolisthesis who had undergone lumbar spine fusion. Methods: All patients (mean age 59 years) had...